From MW2's Wikipedia page...

Activision has announced that two downloadable map packs will be released for Modern Warfare 2. At E3 2009, Microsoft stated that these map packs would first be made available for the Xbox 360 via Xbox Live before they would be released for other platforms. Robert Bowling has stated that the community response to the game and the first two downloadable map packs would be used in designing other potential map packs.

The first map pack, the "Stimulus Package," is set to release on Xbox Live on March 30, 2010 and April 30, 2010 for Playstation 3 at a cost of fifteen dollars. The pack contains five maps: reincarnations of the Crash and Overgrown maps from Call of Duty 4, and three new maps: Bailout, a multi-level apartment complex; Storm, an industrial park littered with heavy machinery; and Salvage, an abandoned car junkyard in the middle of the snow
As it says, for XBOX Live users (like myself), the "Stimulus Package" goes live tomorrow, March 30th. Anyone else, besides myself, going to be downloading this as soon as it's released?