[Haskell-cafe] What's in a name?

The naming of cats is a difficult matter... Ahem. So as you may have noticed, we seem to have a profusion of packages all called "binary" or something dangeriously similar. There's also several "MD5" packages. I could point out a few others. So what I'm wondering is... Do we have a formal convention for the naming of packages and/or the naming of the modules they contain? How are name collisions supposed to be avoided? (E.g., Java uses domain names for this. If I write a package named Foo, I put all the classes in orphi.me.uk.Foo.*)