"Simon Marlow"
I'd just like to say something about the direction I think we want to be headed here. As our package infrastructure and Cabal (http://www.haskell.org/libraryInfrastructure/) become more mature, we should aim to base our library story around Packages. This way we get a consistent view of libraries, with a consistent set of tools to build, install and manage them.
By the way, my random idea for a libraries database would be to have the database updated by uploading Cabal description files which include information about the package name, version numbers, modules contained, compatibility, etc. So whenever someone packaged up their library, they would upload the description file to the server. Maybe they'd upload the package itself too, but that's another story. peace, isaac