"It's an obvious question. The answer isn't quite as simple as they put it. Libraries would be in Google if their library catalogs could be spidered. But they'd still be hampered by OCLC in various ways"-- Thingology Blog.See also Mark Lundy's comments at the OWL: Librarian's Place FriendFeed room.
That should be Mack Lundy, not my typo Mark.