From The Wiki:

Jonathan Coulton is a folk rock singer-songwriter. He is now the Contributing Troubadour at Popular Science magazine as well as the Musical Director for The Little Gray Book Lectures.[1] Coulton is best known for his light-acoustic cover of the Sir Mix-a-Lot hit song “Baby Got Back” and an original piece entitled “Code Monkey”, which is now the theme song for an animated show on G4 called Code Monkeys. A video set to his song “Re: your brains” was a featured link on Good Morning Silicon Valley. His work has also been featured on NPR’s All Things Considered.

I love this guy. According to WIRED, his open source (Creative Commons) business model for self promotion is working wonderfully. This guy, and guys like him, are the future of the music industry.