One of the things we're doing as we're packing, is making sure that all of our books are catalogued via LibraryThing. This evening, we passed the 950 mark. And that still doesn't count the computer books that were in the attic - they got shuffled off to storage before I had a chance to get 'em. I think that I have the bulk of the other books in already - so I'm not sure we'll pass 1000 before the move - but we may well.
Yeah, I know some of you out there have waaay more than 1000 books, but it's a milestone for me. ;)