Tom Lehrer
Everybody knows how I feel about Tom Lehrer - the man is a genius, and I am completely addicted to his songs. Here is a post explaining my fandom a little bit more.

Eric Siegel, PhD
Eric Siegel was a Professor of Computer Science at Columbia. He wrote some songs that I think are pretty funny. Of course, they are probably only funny to about 500 people in the whole world (although "Debugging Angst" should ring a bell with anyone who ever took a programming class in college).

Math Movies
I like movies about math (and computer science, which is really math, when you think about it). I especially like it when they get it right, but when they get it all wrong, it can be fun too.

Games
I like Real Time Strategy games, like Starcraft and Age of Empires. I've also been known to go for days without food, water, or human contact, in order to complete a Civ3 game. Some time ago, I used to like chess... but the graphics just aren't hot enough anymore.

Random Fun
Here is some more interesting stuff that amuses me.