Xbox 360 owners can now download a theme or one of two picture packs from MLB 2K7. The theme is 150 MS points, and the MLB 2K7 pic pack is 60 points while the AL West Pic Pack is 100 points. The are only available in the U.S., Canada and Mexico.

Last minute update from Major Nelson, these have also been added:

Name: Major League Baseball 2K7 -- San Francisco Giants Theme
Price: 150 Points
Availability: Canada, Mexico and the U.S.
Dash Details: Major League Baseball 2K7 -- San Francisco Giants Theme

Name: Major League Baseball 2K7 -- Oakland Athletics Theme
Price: 150 Points
Availability: Canada, Mexico and the U.S.
Dash Details: Major League Baseball 2K7 -- Oakland Athletics Theme