Headed to PAX Prime this year... if so be sure to pick up a free Limited Edition Retro City Rampage Avatar T-Shirts - only 1000 of each gender have been generated so they will be pretty rare. There's also a chance to win a copy of the game when it is released on Xbox Live.
More details here: retrocityrampage.com/pax11.php...
If you can't attend PAX Prime then various places on the net will be giving away codes too... details on where can also be found in the above link.
UPDATE: We now have a Male and Female code to giveaway, details on how to enter will be up on the site tomorrow (21st Aug).