LivePlasma

Well, if this (LivePlasma) ain't the fanciest piece of something or other that I've seen since the brain. Here's a tool where you enter a band or movie that you like, and it maps out other bands or movies that you may be interested in. I don't know who decides what bands are similar, or if it just mines from Amazon or iTunes, or wherever, but it seems to map out "genres" pretty well. It includes a goodly amount of bands, but misses some of my favorites. Still, it's kind of neat in an Amazon kind of if-you-like-x-then-you-may-like-y way.