Microsoft has signed Sean "P.Diddy" Combs, to help promote Xbox's new slogan, "Let's Play Together." Diddy's voice will be featured in the commercials."I'm proud to be the voice responsible for connecting millions to the Xbox brand," Combs said in a statement. "I love playing Xbox games and believe that the system's cultural influence as a social entertainment brand has only just begun."The new commercials will emphasize Xbox's live multiplayer gaming. The 30 second spots will start running in time for the holidays.