That's pretty cool. Mouse and Keyboard support would be nice if they could get it right for FPS games. The mouse and keyboard adapters for Xbox were poor at best. they didn't get the "feel" right. I would know, I played a ton of Halo 2 with one and even prefer a controller over it. Claw FTW!
Well I downloaded the new interface and I must say that it is a whole lot cleaner than the first one. The battery icon in the in-game "mini-dash" is a lot bigger and 1080p shows up in my display options. I can switch to 1080p but it looks like junk cause it can only go to 1080i (but no harm in trying, right?)
I do like the new layout of the Marketplace, I still want to try the USB keyboard and see how that works. Hopefully my wireless keyboard can work cause sending messages takes a hell of a long time with the controller