The Sony Rolly is now officially available. The Rolly is a small MP3 player by Sony that plays music, and dances along with it as well as displaying "up to 700 colors of lighting." You can choreograph your own routine for your Rolly, or have it move on its own.

I got a chance to play with one of these at CES this year. They're pretty cool, but with a $400 price tag probably not exactly worth it.

Have any of you seen the Rolly in action? Would you buy one for $400? Check out video of the Rolly in action here.