With all the talk of Dewey or Don't We...
Gawd I'm getting tired of that phrase.
Anyway, with all the talk of whether or not libraries should use DDC, LCCN, BISAC, or something else for their collections and then the possibility of using open databases instead of OCLC, it seems like cataloguing is on everybody's mind.
It is over at LibraryThing too, where they've issued a call for the creation of OSC, or the Open Shelves Classification. They're looking for a few librarians who are of a mind to create a system that's free, "humble," modern, open source, and crowd sourced. Indeed, they want something that the library profession has needed for a long time - a modern system capable of changing, and changing easily.
So if you're of the cataloguing bent, check it out.