Quote from Tiltedscreen.com
"Last month Tiltedscreen.com reported that the UK was getting a special Preorder bonus,The Flaming Warthog. It has been revealed on Xbox Live that North America will also see the preorder bonus. Also if you preorder in North America you will receive a Halo Ringtone. In order to get the free halo ringtone you must snap a pic on Xbox live of a QRcode and send it to gettab.mobi, also must preorder before March 3rd 2009"