[link|http://www.google.com/search?hs=Bow&hl=en&lr=&client=firefox-a&rls=org.mozilla%3Aen-US%3Aofficial&q=site%3Aoreilly.com+%22database+war+stories%22&btnG=Search|Google Search for database war stories] where most of the databases aren't. There might be some ideas in there; O'Reilly talks to Flickr, craigslist, Google File System, etc.
--Tony