I just tried this out, even though I have a 4:3 TV, and must say it looks nice (squashed a bit, but that's because it's not made for 4:3... sure hope you can get that working!).
A couple of requests, though...
Any chance of seeing the Big Wide Icon views, especially in the Programs (I would REALLY miss this view for my games). And being able to select a background picture for the home page in the skin settings? And I really do miss being able to hit the up arrow to go to the Favorites. I know it's a work in progress, just throwing some suggestions out.