This weekend is double XP in COD4 Multiplayer on Xbox Live, starting about 2 hours ago and running through Sunday. At the same time, the Variety Map Pack is discounted 50% to just 400 MS points.  For $5, you can play in two of my favorite maps, Chinatown and Broadcast, and get your head sniped off 5000 times in Creek (if your skill level is similar to mine). Killhouse is the 4th map, and it’s awesome for 1v1. See you in Headquarters, where I’ll be spending my weekend.