Lisencing Your Tweets!

As I was surfing for creative inspiration for web design, I came across an interesting concept.... http://tweetcc.com/

It's basically a Creative Commons-like licensing for your tweets on Twitter. It's quite interesting, what do you guys think about licensing tweets? Twitter does make it clear that they don't own or have any hold over your tweets, but what about people who want to license their tweets? Why do you think people want to license their tweets?