diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,14 @@
 Brick changelog
 ---------------
 
+0.30
+----
+
+API changes:
+ * `Brick.Focus`: added `focusSetCurrent` to make it easy to set the
+    focus of a focus ring
+ * `Brick.Main`: added a simple polymorphic `App` value, `simpleApp`
+
 0.29.1
 ------
 
diff --git a/README.md b/README.md
--- a/README.md
+++ b/README.md
@@ -20,8 +20,6 @@
 [vty](http://hackage.haskell.org/package/vty), so some knowledge of Vty
 will be helpful in using this library.
 
-This library deprecates [vty-ui](https://github.com/jtdaugherty/vty-ui).
-
 Example
 -------
 
@@ -51,7 +49,7 @@
 To get an idea of what some people have done with `brick`, take a look
 at these projects:
 
- * `tetris`: https://github.com/SamTay/tetris
+ * `tetris`, an implementation of the Tetris game: https://github.com/SamTay/tetris
  * `gotta-go-fast`, a typing tutor: https://github.com/hot-leaf-juice/gotta-go-fast
  * `haskell-player`, an `afplay` frontend: https://github.com/potomak/haskell-player
  * `mushu`, an `MPD` client: https://github.com/elaye/mushu
@@ -61,16 +59,17 @@
  * `silly-joy`, an interpreter for Joy in Haskell: https://github.com/rootmos/silly-joy
  * `herms`, a command-line tool for managing kitchen recipes: https://github.com/jackkiefer/herms
  * `purebred`, a mail user agent: https://github.com/purebred-mua/purebred
+ * `2048Haskell`, an implementation of the 2048 game: https://github.com/8Gitbrix/2048Haskell
 
 Getting Started
 ---------------
 
-TLDR:
+Check out the many demo programs to get a feel for different aspects of
+the library:
 
 ```
-$ cabal sandbox init
-$ cabal install -j -f demos
-$ .cabal-sandbox/bin/brick-???-demo
+$ cabal new-build -f demos
+$ find dist-newstyle -type f -name \*-demo
 ```
 
 To get started, see the [user guide](https://github.com/jtdaugherty/brick/blob/master/docs/guide.rst).
@@ -80,7 +79,7 @@
 
 Documentation for `brick` comes in a variety of forms:
 
-* [The brick user guide](https://github.com/jtdaugherty/brick/blob/master/docs/guide.rst)
+* [The official brick user guide](https://github.com/jtdaugherty/brick/blob/master/docs/guide.rst)
 * [Samuel Tay's brick tutorial](https://github.com/jtdaugherty/brick/blob/master/docs/samtay-tutorial.md)
 * Haddock (all modules)
 * [Demo programs](https://github.com/jtdaugherty/brick/blob/master/programs)
@@ -122,10 +121,10 @@
 ------
 
 There are some places were I have deliberately chosen to worry about
-performance later for the sake of spending more time on the design (and
-to wait on performance issues to arise first). `brick` is also something
-of an experimental project of mine and some aspects of the design
-involve trade-offs that may are not entirely settled. In addition you
+performance later for the sake of spending more time on the design
+(and to wait on performance issues to arise first). `brick` is also
+something of an experimental project of mine and some aspects of the
+design involve trade-offs that are not entirely settled. In addition you
 can expect this library to follow a principle of fearless improvement:
 new versions will make (sometimes substantial) API changes if those
 changes really do make the library better. I will place more importance
diff --git a/brick.cabal b/brick.cabal
--- a/brick.cabal
+++ b/brick.cabal
@@ -1,5 +1,5 @@
 name:                brick
-version:             0.29.1
+version:             0.30
 synopsis:            A declarative terminal user interface library
 description:
   Write terminal applications painlessly with 'brick'! You write an
diff --git a/docs/guide.rst b/docs/guide.rst
--- a/docs/guide.rst
+++ b/docs/guide.rst
@@ -50,8 +50,7 @@
 
    $ git clone https://github.com/jtdaugherty/brick.git
    $ cd brick
-   $ cabal sandbox init
-   $ cabal install -j
+   $ cabal new-build
 
 Building the Demonstration Programs
 -----------------------------------
@@ -1383,7 +1382,7 @@
 or ``mapAttrNames`` to convert its custom names to the names that the
 sub-widget uses for rendering its output.
 
-.. _vty: https://github.com/coreyoconnor/vty
+.. _vty: https://github.com/jtdaugherty/vty
 .. _Hackage: http://hackage.haskell.org/
 .. _microlens: http://hackage.haskell.org/package/microlens
 .. _bracketed paste mode: https://cirw.in/blog/bracketed-paste
diff --git a/programs/MouseDemo.hs b/programs/MouseDemo.hs
--- a/programs/MouseDemo.hs
+++ b/programs/MouseDemo.hs
@@ -125,7 +125,7 @@
 
     void $ M.customMain buildVty Nothing app $ St [] Nothing
            "Press Ctrl-up and Ctrl-down arrow keys to scroll, ESC to quit.\n\
-           \Observe the click coordinates identify the\n\
+           \Observe that the click coordinates identify the\n\
            \underlying widget coordinates.\n\
            \\n\
            \Lorem ipsum dolor sit amet,\n\
diff --git a/src/Brick.hs b/src/Brick.hs
--- a/src/Brick.hs
+++ b/src/Brick.hs
@@ -1,5 +1,8 @@
 -- | This module is provided as a convenience to import the most
--- important parts of the API all at once.
+-- important parts of the API all at once. Note that the Haddock
+-- documentation for this library is for /reference/ usage; if you
+-- are looking for an introduction or tutorial, see the README for links
+-- to plenty of material!
 module Brick
   ( module Brick.Main
   , module Brick.Types
diff --git a/src/Brick/Focus.hs b/src/Brick/Focus.hs
--- a/src/Brick/Focus.hs
+++ b/src/Brick/Focus.hs
@@ -8,6 +8,7 @@
   , focusNext
   , focusPrev
   , focusGetCurrent
+  , focusSetCurrent
   , focusRingCursor
   , withFocusRing
   , focusRingModify
@@ -66,6 +67,14 @@
 -- is emtpy, return 'Nothing'.
 focusGetCurrent :: FocusRing n -> Maybe n
 focusGetCurrent (FocusRing l) = C.focus l
+
+-- | Set the currently-focused resource name in the ring, provided the
+-- name is in the ring. Otherwise return the ring unmodified.
+focusSetCurrent :: (Eq n) => n -> FocusRing n -> FocusRing n
+focusSetCurrent n r@(FocusRing l) =
+    case C.rotateTo n l of
+        Nothing -> r
+        Just l' -> FocusRing l'
 
 -- | Modify the internal circular list structure of a focus ring
 -- directly. This function permits modification of the circular list
diff --git a/src/Brick/Main.hs b/src/Brick/Main.hs
--- a/src/Brick/Main.hs
+++ b/src/Brick/Main.hs
@@ -4,6 +4,7 @@
   , customMain
   , simpleMain
   , resizeOrQuit
+  , simpleApp
 
   -- * Event handler functions
   , continue
@@ -74,6 +75,7 @@
 import Brick.Types.Internal
 import Brick.Widgets.Internal
 import Brick.AttrMap
+import qualified Brick.Widgets.Core as C
 
 -- | The library application abstraction. Your application's operations
 -- are represented here and passed to one of the various main functions
@@ -129,14 +131,24 @@
            => Widget n
            -- ^ The widget to draw.
            -> IO ()
-simpleMain w =
-    let app = App { appDraw = const [w]
-                  , appHandleEvent = resizeOrQuit
-                  , appStartEvent = return
-                  , appAttrMap = const $ attrMap defAttr []
-                  , appChooseCursor = neverShowCursor
-                  }
-    in defaultMain app ()
+simpleMain w = defaultMain (simpleApp w) ()
+
+-- | A simple application with reasonable defaults to be overridden as
+-- desired:
+--
+-- * Draws only the specified widget
+-- * Quits on any event other than resizes
+-- * Has no start event handler
+-- * Provides no attribute map
+-- * Never shows any cursors
+simpleApp :: Widget n -> App s e n
+simpleApp w =
+    App { appDraw = const [w]
+        , appHandleEvent = resizeOrQuit
+        , appStartEvent = return
+        , appAttrMap = const $ attrMap defAttr []
+        , appChooseCursor = neverShowCursor
+        }
 
 -- | An event-handling function which continues execution of the event
 -- loop only when resize events occur; all other types of events trigger
diff --git a/src/Brick/Themes.hs b/src/Brick/Themes.hs
--- a/src/Brick/Themes.hs
+++ b/src/Brick/Themes.hs
@@ -6,43 +6,45 @@
 -- theme customizations in INI-style files.
 --
 -- The file format is as follows:
--- * Customization files are INI-style files with two sections, both
---   optional: "default" and "other".
--- * The "default" section specifies three optional fields:
---   * "default.fg" - a color specification
---   * "default.bg" - a color specification
---   * "default.style" - a style specification
--- * A color specification can be any of the values (no quotes)
---   "black", "red", "green", "yellow", "blue", "magenta", "cyan",
---   "white", "brightBlack", "brightRed", "brightGreen", "brightYellow",
---   "brightBlue", "brightMagenta", "brightCyan", or "brightWhite".
--- * A style specification can be either one of the following values
---   (without quotes) or a comma-delimited list of one or more of the
---   following values (e.g. "[bold,underline]") indicating that all of
---   the specified styles be used.
---   * "standout"
---   * "underline"
---   * "reverseVideo"
---   * "blink"
---   * "dim"
---   * "bold"
--- * The "other" section specifies for each attribute name in the theme
---   the same "fg", "bg", and "style" settings as for the default
---   attribute. Furthermore, if an attribute name has multiple
---   components, the fields in the INI file should use periods as
---   delimiters. For example, if a theme has an attribute name ("foo" <>
---   "bar"), then the file may specify three fields:
---   * "foo.bar.fg" - a color specification
---   * "foo.bar.bg" - a color specification
---   * "foo.bar.style" - a style specification
 --
+-- Customization files are INI-style files with two sections, both
+-- optional: @"default"@ and @"other"@.
+--
+-- The @"default"@ section specifies three optional fields:
+--
+--  * @"default.fg"@ - a color specification
+--  * @"default.bg"@ - a color specification
+--  * @"default.style"@ - a style specification
+--
+-- A color specification can be any of the strings @black@, @red@,
+-- @green@, @yellow@, @blue@, @magenta@, @cyan@, @white@, @brightBlack@,
+-- @brightRed@, @brightGreen@, @brightYellow@, @brightBlue@,
+-- @brightMagenta@, @brightCyan@, @brightWhite@, or @default@.
+--
+-- A style specification can be either one of the following values
+-- (without quotes) or a comma-delimited list of one or more of the
+-- following values (e.g. @"[bold,underline]"@) indicating that all
+-- of the specified styles be used. Valid styles are @standout@,
+-- @underline@, @reverseVideo@, @blink@, @dim@, and @bold@.
+--
+-- The @other@ section specifies for each attribute name in the theme
+-- the same @fg@, @bg@, and @style@ settings as for the default
+-- attribute. Furthermore, if an attribute name has multiple components,
+-- the fields in the INI file should use periods as delimiters. For
+-- example, if a theme has an attribute name (@"foo" <> "bar"@), then
+-- the file may specify three fields:
+--
+--  * @foo.bar.fg@ - a color specification
+--  * @foo.bar.bg@ - a color specification
+--  * @foo.bar.style@ - a style specification
+--
 -- Any color or style specifications omitted from the file mean that
 -- those attribute or style settings will use the theme's default value
 -- instead.
 --
--- Attribute names with multiple components (e.g. attr1 <> attr2) can
+-- Attribute names with multiple components (e.g. @attr1 <> attr2@) can
 -- be referenced in customization files by separating the names with
--- a dot. For example, the attribute name "list" <> "selected" can be
+-- a dot. For example, the attribute name @"list" <> "selected"@ can be
 -- referenced by using the string "list.selected".
 module Brick.Themes
   ( CustomAttr(..)