3D Conversion of Star Wars trailer posted - Feb 10, 2012 release
 

Star Wars: Episode 1 - The Phantom Menace - Movie Trailers - iTunes

I personally saw the first few minutes of Star Wars (Episode IV) converted to 3D on a Mitsubishi DLP display at the 2009 CES and they did an excellent job. I don't think I've seen better conversion work since.
I'm not a huge fan of the prequels but I'm sure my kids will force me to go. I'm waiting patiently for the conversions of the original trilogy.