Okay, so this isn’t an idea, but I couldn’t pass it up. The 100 millionth unique bibliographic record for WorldCat is a book called It’s a Horse’s Life . Too cute. There’s a good blog entry about this here, by Thom Hickey.
Do you use OCLC WorldCat? How? As an individual? As a library/institution?
Let me know, I’m interested. 
