Decemberists need your help

Here's a cool contest for all of you creative Decemberists fans: The band shot part of a video for the song O Valencia! in front of a green screen. Submit an animation to use as the background by Dec. 15, and you could win an iMac Intel Core 2 Duo.

Sounds like it would be fun if you had the time. The song is great to boot. My excuse is I'm too lazy though.