diff --git a/churros.cabal b/churros.cabal
--- a/churros.cabal
+++ b/churros.cabal
@@ -1,13 +1,15 @@
 cabal-version:       2.2
 name:                churros
-version:             0.1.0.0
+version:             0.1.0.1
 license-file:        LICENSE
 author:              Lyndon Maydwell
 maintainer:          lyndon@sordina.net
+homepage:            http://github.com/sordina/churros
+bug-reports:         http://github.com/sordina/churros/issues
 build-type:          Simple
 extra-source-files:  CHANGELOG.md
 license:             MIT
-synopsis:            Churros: Channel/Arrow based streaming computation library.
+synopsis:            Channel/Arrow based streaming computation library.
 category:            Data, Control
 description:         The Churro library takes an opinionated approach to streaming
                      by focusing on IO processes and allowing different transport
@@ -16,10 +18,6 @@
 source-repository head
   type:     git
   location: git@github.com:sordina/churros.git
-
--- custom-setup
---    setup-depends:
---      base, Cabal, cabal-doctest
 
 common churros-dependencies
   default-language: Haskell2010
diff --git a/src/Control/Churro/Prelude.hs b/src/Control/Churro/Prelude.hs
--- a/src/Control/Churro/Prelude.hs
+++ b/src/Control/Churro/Prelude.hs
@@ -106,7 +106,7 @@
 -- >>> runWaitChan $ sourceIO (\cb -> cb 4 >> cb 2) >>> sinkPrint
 -- 4
 -- 2
-sourceIO :: Transport t => ((o -> IO ()) -> IO a2) -> Churro t Void o
+sourceIO :: Transport t => ((o -> IO ()) -> IO ()) -> Churro t Void o
 sourceIO cb =
     buildChurro \_i o -> do
         cb (yeet o . Just)
@@ -114,6 +114,16 @@
 
 -- ** Sinks
 
+-- | Consume all items with no additional effects.
+-- 
+-- TODO: Decide if we should use some kind of `nf` evaluation here to force items.
+-- 
+-- >>> runWaitChan $ pure 1 >>> process print >>> sink
+-- 1
+-- 
+sink :: Transport t => Churro t b Void
+sink = sinkIO (const (return ()))
+
 -- | Consume a churro with an IO process.
 -- 
 -- >>> runWaitChan $ pure 1 >>> sinkIO (\x -> print "hello" >> print (succ x))
@@ -128,6 +138,7 @@
 -- "hi"
 sinkPrint :: (Transport t, Show a) => Churro t a Void
 sinkPrint = sinkIO print
+    
 
 -- ** Churros
 
diff --git a/src/Control/Churro/Types.hs b/src/Control/Churro/Types.hs
--- a/src/Control/Churro/Types.hs
+++ b/src/Control/Churro/Types.hs
@@ -24,12 +24,19 @@
 -- ** Data, Classes and Instances
 
 -- | The core datatype for the library.
---   Parameters`t`, `i` and `o` represent the transport,
---   input and output types respectively.
 -- 
+-- Parameters `t`, `i` and `o` represent the transport, input, and output types respectively.
+-- 
+-- The items on transports are wrapped in `Maybe` to allow signalling of completion of a source.
+-- 
 -- When building a program by composing Churros, the output Transport of one Churro is fed into the input Transports of other Churros.
 -- 
-data Churro t i o = Churro { runChurro :: IO (t (Maybe i), t (Maybe o), Async ()) }
+-- Convenience types of `Source`, `Sink`, and `DoubleDipped` are also defined, although use is not required.
+-- 
+data Churro t i o   = Churro { runChurro :: IO (t (Maybe i), t (Maybe o), Async ()) }
+type Source t   o   = Churro t Void o
+type Sink   t i     = Churro t i Void
+type DoubleDipped t = Churro t Void Void
 
 -- | The transport method is abstracted via the Transport class
 -- 
@@ -115,6 +122,7 @@
                     (Just f', Just g') -> (yeet o $ Just (f' g')) >> prog
                     _                  -> return ()
 
+        -- TODO: Should we cancel asyncs here in finally block?
         prog
         yeet o Nothing
         wait fa
@@ -136,7 +144,8 @@
 --         m <- arr (> 5) -< j
 --         n <- sect      -< (k,l,m)
 --         o <- arr not   -< n
---         sinkPrint      -< o
+--         p <- delay 0.1 -< o
+--         sinkPrint      -< p
 -- in
 -- runWaitChan $ sourceList [1,5,30] >>> graph
 -- :}