An FCC listing last week showed it had reviewed an official 802.11n wireless adaptor Microsoft's developing for the 360. A flier in an Italian Gears of War 2 pointed to the same thing. The company has formally confirmed its existence.
Microsoft gave the statement to Joystiq earlier today but did not divulge a release date or a suggested cost. Reading between the lines of this statement, it appears Microsoft will sell it alongside its existing regular flavour wireless adaptor.