Much as I want to headline this as a "free map download," that would be misleading. Because these aren't playable maps, but they are high resolution overhead shots of the 10 used in Battlefield: Bad Company 2's multiplayer.
The Battlefield guys made 'em available through the game's download page, figuring some folks might appreciate the assist in marking all the choke points, ambush spots and hiding places.
The 137 MB file contains 20 images, two of each of the game's 10 maps released through the third pack. The map kit is now live on the game's download page, so run go get it if you're one of those crazy crazy people who actually use tactics in your online multiplayer.
Battlefield: Bad Company 2 Map Kit Available for Download [Battlefield Blog]