If you happened to buy the Modern Warfare 2 "Stimulus Package" map pack immediately upon launch, you got problems first, and maps later. To get over the complications caused by your attempted Mapathy treatment, Microsoft's Larry "Major Nelson" Hryb announced that day-one buyers of the map pack will receive a free week of Gold Xbox Live membership. "Check your Live messages," according to Major Nelson, for notice of the reward.
Even if every single person who ever bought the Stimulus Package already has a Gold membership, now you have it for a week longer! And for nothing but a minor inconvenience.