Is cool to watch. But its well hard to do in terms of technique. And really, really knackering. This guy is good though:

http://www.youtube.com/watch?v=Bt5Uav59yhE

This girl isn't too bad, but the guy is dead cool for being so nonchelant as to dance with one hand in his pocket:

http://www.youtube.com/watch?v=O6UmOztcKwY

This girl is pretty decent as well, but the video isn't that great:

http://www.youtube.com/watch?v=Yx5cShKbMFc&feature=related

There are some other good ones too, especially one with two girls who are fucking brilliant at dancing in time with one another (and they dance really fast), but I can't find it at the moment.