This is VERY cool. A couple of dudes battle it out in [this video on VideoSift](http://videosift.com/story.php?id=630).
The choreography is excellent. One of them knows or has been shown some martial arts, so there’s that touch of realism.
There’s another home made lightsabre duel [here](http://video.google.com/videoplay?docid=7292576415845588372). Different dudes and arguably “better” from a martial arts perspective.
And more lightsabre stuff [here](http://www.videosift.com/story.php?id=1876)