A flurry of Haskell Implementations with Cabal
The fun thing for me, is that they all come with The Haskell Cabal. This is an enabling technology for packagers and an eventual CPAN-like package database for Haskell tools. Each of today's release announcements highlighted Cabal.
This effectively adds up to the first major release of the Haskell Cabal, 0.6! Woohoo!
The point of the cabal is to make a standard way to build and install Haskell tools. Cabal packages come with a little Haskell script, Setup.lhs, which has a standard interface. The Cabal provides a library that implements this interface.