If you subscribe to Qore, the PlayStation digital magazine, on or before Dec 15, 2009, you will get access to the ModNation Racers beta which is suspected to launch this month. To wet your appetite, the PlayStation Blog posted its first walkthrough for creating a character:

Want to know what else is in Qore? Releasing tomorrow, Qore will feature Dark Void, The Saboteur and the long awaited White Knight Chronicles.