I ordered one on 2/3/12 from my local dealer.
It is supposed to arrive in mid-March 2012.
It's the TT Indoor Car Cover for vehicles with a fixed rear wing (including the TT RS).
I spoke to a great guy (Mike Nichols) at the Audi dealership in West London UK.
He provided me with the correct part number for the cover. It was incorrect on the UK accessories website.
I then called my contact at Audi of America and she had the parts group work on making the cover available to U.S. dealers.
Prior to a few weeks ago the part number was not in the U.S. dealer's order system.
The part # is 8J8061205A (the 0's are zeros).
Cost = $439.
I have not seen a photo of it, but it's supposedly black with silver/grey piping and it has the four rings logo on the hood.