Boil the Frog

http://static.echonest.com/frog/

This is a neat website, where you can punch in a few artists and it'll come up with what should be a logical transition between the two of them songwise. Say, heading between Weezer and Lady Gaga in 18 songs (or Iron Maiden in 14 songs - somehow Maiden's easier to get to than Gaga from Weezer). It's a neat toy, I doubt it'll keep my interest long but it's interesting to see what it can come up with in the meantime