I just read a joystiq article about how Digital Press is offering money for the discovery of easter eggs in certain games and after reading through what they're looking for it seems like a bunch of them could be possibly cracked by using TAS tools such as memory watch.
Here is the full list of easter eggs they're looking for along with prices. Interesting stuff that seems like it might be of interest to some of the people here.
http://www.digitpress.com/eastereggs/eastereggcontest.htm