Since xbox *wired* controllers are just USB we've been able to use them with XNA since day one. However, not everyone owns wired controllers and why buy extra when you already have wireless ones. Well if you you buy the Xbox 360™ Wireless Gaming Receiver for Windows then you can join in the fun. Ignore the fact that the Microsoft site says 'coming soon' - you can buy it on Amazon today.

John Shute just blogged that this means that you can also use the Xbox 360 Wireless Racing Wheel with XNA on the PC now. There are actually many different racing wheel vendors - I'm not sure which is the best but one of these are on my shopping list for when I get back from GDC: