If there was any scrap of doubt in your mind, we'll obliterate it for you right now -- October 11th is the day Windows Phone 7 will be unveiled in the US , not just at a fancy London event... and wonder of wonders, T-Mobile's the star of the show. Looks like AT&T won't be launching Metro UI handsets all alone, eh? The event agenda clearly states there will be "an exclusive showing of T-Mobile powered Windows Phone 7 devices" at 3:30PM EST, and you can bet your britches we'll be there live to cover the whole thing.[Thanks, James T.]