Only in the US I'm afraid...

Pepsi is running a sweepstakes competition, giving away an Xbox 360 every 10 minutes until 10/31/05.  Starts 8/28/05.

"To play, consumers will collect codes found under the caps of Mountain Dew and other participating Pepsi products, and enter codes in a personal online account at Participants will be able to choose which 10-minute drawing to enter, and can spread codes across different drawings or stockpile codes and put them all toward one drawing. In addition, codes entered will automatically earn the participants points toward obtaining collectible merchandise and gear."

via Digg.