Here's a brilliant TRON: Legacy/Star Wars trailer mash-up. I found it through imdb.com, who had a link from www.nextmovie.com, who got it courtesy of the L.A. Times (www.herocomplex.latimes.com).
*is dizzy now*
^ I am not endorsing any sites above, per se. Merely noting where I got the video. :)
It's a seriously genius video, taking the audio from the TRON: Legacy trailer and fitting Star Wars shots to it.