Though I am still disappointed that I could not get my own 360 (each time one was in town, I was out!), I got to check out a few games on my friend's console, and they were just awesome. So here is my little Interactive Designer thanks to the 360 teams - rock on!
As usual, I tried creating another custom control - this time with little a help from Peter Blois :). In this case, the ListBox tracks the user's mouse and scrolling speed changes based on proximity - my take on the Media Center ListBox. Feel free to check out the source code and reuse / improve it.