Wow, what a great idea! This is a simple way to keep some of those extra cords organized. We all have a bunch of extra cords that seem to fall behind the desk, or just get in the way. I will definitely be adding this to my "things to do" list.
Learn how to make your own Simple desktop cord keeper
http://blog.makezine.com/archive/2008/06/diy_simple_desktop_cord_k.html