http://www.gamestop.com/gs/tournamen...0/default.aspx

Madden NFL 10 tournament at over 2,000 Gamestop stores. It looks liek the store level winner will get a faceplate wince there are 2,500 of them as prizes:

2,500 Round 1 Prizes: a Madden NFL 10 Xbox 360 Faceplate (ARV: $9.99 each)
$9.99, lulz. I'll give you $9.99 for one.

This is the only one known of so far. There is a chance that there may be a one of a kind plate offered for the winner, which looks like what happened last year. I haven't heard if there is a collectors edition being released.

Note: There were three NCAA Football 10 plates released this year - the standard, the mascots and the helmets. I've only seen one of the standards go through eBay. It went as a buy it now and sold almost immediately after it was posted.