At the moment I am working on a System.FilePath module combining Lemmih's one from cabal, and the one from Yhc. In order to do this I have had to abuse Monad's to the extreme (instance Monad Test) and CPP to the extreme (#define module --). Hopefully the result will be useful to a large number of people, and might even make it into base. [Note: the interface to System.FilePath is unstable, and will change - if you have any suggestions please let me know!]
I have also been advocating Haskell to my research group, to the stage where in my group there is only one hold out Python programmer, and everyone else has moved to Haskell even for non-Haskell related projects/PhD's. Now I have to start trying to persuade them to move to Windows...