Ultimate Electronics on Rainbow in Las Vegas has one on display (check it out during a Comdex visit).
The color and picture quality were very good. Picture seemed a little dim in complete darkness but looked better with some lights on (probably due to the type of screen being used). I wasn't able to watch any credits to check for rainbows.
Seeing it reinforced in my mind the need for 1500+ lumens in a projector. Maybe when Sanyo comes out with a 16:9 light cannon I'll be ready to write a check.