Dust off that M4 Carbine. In celebration of the fact that Call of Duty 4 retook the #1 spot on Xbox Live Infinity Ward has decided to give back in the form of a Double XP weekend on both Xbox 360 and PS3 versions of their game. This means you'll rank up twice as fast, unlocking more guns and perks for your fragging pleasure.
This is also the perfect time to pick up a copy of Call of Duty 4, what with the Game of Year edition and previously released map packs. Oh, and the Double XP weekend has already started so go sign on now. We'll still be here when your thumbs start bleeding.