I've been inspired by a recent school assignment to put my library, even in its diminished state, onto LibraryThing for cataloging purposes. I'm not sure if I have to make it public; if I don't, I might just keep it to myself for awhile.
Does anybody use it for your own library? For your work's library? For your group's library? Let me know!
Edited to Add:
Damn, this is addicting. I've only done 35 books so far and I could stay up all night...