Great Topic!!!!!
www.deadmaneating.com - I had a brief obsession with the "last meals" of executed death row inmates. This site helped me quickly get over it
www.musicplasma.com - gives a visual geneology of nearly any band you can think of. great for when you like a particular artists and want to start listening to similar stuff
www.epicurious.com - I love food almost as much as I love music (plus I'm a waiter in a fine dining restaurant) This is a great culinary reference/recipe site.