I stopped working on it because it seems that Microsoft is going to kill XNA sometime soon (year or so). They do not support XNA on Win8 on ARM and will not support it in Windows Phone 8. I own a winphone7 but do not own an xbox. Since the WP7 will pretty much be obsolote in October, I decided it was not worth my time and effort to continue working on it :( . The source code is still there if somebody want to take a stab at it.