I thought Weird Al Yankovic would never do better at capturing the essence of geek than his song "It's All About the Pentiums" (YouTube video).
But, his new song, "White and Nerdy" (Google Video), also is inspired. One of my favorite parts: "There's no killer app I haven't run / At Pascal, well I'm number one / Do vector calculus just for fun / I ain't got a gat but I got a soldering gun." Yep. As Weird Al says, "How'd I get so white and nerdy?"
If you're a geek and you haven't seen both of these videos, take the time to check them out. Definitely good for a laugh.