I was using the D-Link DAP-1522 draft-N bridge with my Xbox 360 when I had it downstairs in my house, with a D-Link DIR-655 draft-N router upstairs. It worked fine and the 1522 was roughly the price of the MS wireless adapter at the time but was obviously more flexible.
The 1522 is also dual band so if you have a dual band router such as the DIR-825 or DIR-855, you can take advantage of that as well.