@inpiration x
Give them some time the device was just released. I am pretty sure they will allow xna games to be uploaded. Currently MS has three different lines where apps can be donwloaded. Win Mobile, Zune and X-box, not to mention Pink and Courier, I think that MS is trying to align the app stores for all of these before they open the flood gates and have 5 segmented division instead of 5 product lines in one eco-system.