Amazon has acquired ABEBooks, the used-book dealer out of Vancouver. Abebooks has been around since 1996 (used to be Advanced Book Exchange). The company will continue to operate as a standalone business.
See "Amazon to Acquire AbeBooks, and with it a Stake in LibraryThing," by Michael Arrington,
http://www.techcrunch.com/2008/08/01/amazon-to-acquire-abebooks/