I learned about Jonathan Coulton from Anna and Jason who do a weekly podcast I like. They mentioned him in passing – saying they missed his last concert, but had seen him recently, so I checked him out. I’m glad I did.
Last year he wrote a song a week. He called it Thing a Week and uploaded it to his website for free download. My favorite is Creepy Doll, although RE Your Brains is a lot of fun too.
Check out his You page for links for videos and other multimedia that people have made using his music. Some are are a hoot.
Here is a YouTube video of him performing Creepy Doll.