MC Frontalot, the world's 579th-greatest rapper. Nerdcore Hiphop is the music of the future.
MC Frontalot is a rapper who has created what he calls "Nerdcore." It's hiphop that is geeky, basically. He's been around for a while, but I only heard about him in recent months. I'm not a big fan of rap and hiphop, but some of his stuff is really cool.
I recommend "Which MC Was That?", and "The Penny Arcade Theme."