Hi
1. For certain tasks, there are multiple possible packages, and it's not really clear which one to go for. Having more than one choice is good. (E.g., there's Gtk2hs and there's wxHaskell, and you pick the one you want based on personal preference.) Having *dozens* of different packages for the same task, some more complete than others, some more maintained than others, etc., is just confusing. + points 3 and 4
This can be solved easily using blogs. If you use a package successfully, blog about it. Write about how great it was, or what was lacking. Say what problems you ran into. Perhaps write a slightly tutorialish post saying what you used it for and a snippet of code. If a few people do this, Google will do the rest with search results.
2. Most things on Hackage don't seem to want to work on Windows. (Evidently this is being worked on. Stream Fusion installed just fine with a little help from Duncan...)
Windows, the unloved Haskell platform... Not much you can do about this, short of breaking into peoples houses and reformatting their hard drive. I know most authors would be happy to accept a patch fixing whatever issue there is - so all it needs is more Windows users. Perhaps a wiki page listing the common mistakes a Linux user can make to render their package non-working on Windows? Thanks Neil