All the life's wisdom can be found in anagrams. Anagrams never lie. I've gotten some ideas for some unusual nicknames from here. Would be more exciting if it took cues from key words, but is mildly entertaining as is. Insult your less literary friends without them ever knowing you did so.
Lists of lists abound.
Not for the queasy but makes good use of progressive graphics and also incorporates messages according to wether or not you guess a correct letter. College-wide access to many of these is being developed by the Library and Information Systems Division through the ELIB Project. Very nicely put together. A collection of online treasure hunts, puzzles, and games. The Kids' Electronic Soap Box.