I uploaded the API docs corresponding to the current version to the community server:
They can be regenerated on your repository by using the latest and greatest versions packages of Cabal, cabal-install and haddock.
cabal install Cabal
cabal install cabal-install
cabal install haddock
The documentation will also soon be found on Hackage, as soon as it upgrades to these versions, and then the API will be searchable via Hayoo! A nice example of leveraging the Haskell toolchain.
Another example: using Hoogle, you can search the API right now (if you have the darcs repo).
cabal install hoogle
hoogle --data=yi.hoo "your query"