The first Halo 3 map pack will be made available December 11th. The pack contains three maps and will cost 800 points (a little steep, Bungie!). Details from the press release are as follows:
Available for 800 Microsoft Points exclusively on Xbox LIVE Marketplace, each map presents a totally different play style. Standoffâ€™s symmetrical valley, with its entrenched bases and fields of boulders is ideal for mid-sized objective and Slayer game types, while Ratâ€™s Nestâ€™s vast, labyrinthine passages bring something new to the â€œHaloâ€ multiplayer experience: an indoor vehicle paradise, strongly influenced by the Campaign mode, ideal for big team battles. Finally, Foundry is the ultimate Forge map â€“ players can edit every single object in this voluminous industrial warehouse, place stairways, walls, bridges and tunnels to create an entirely new play space and build almost any kind of map they can think of.
Here are some pictures, borrowed from BlimBlim at Gamersyde (thanks!):
Note: These screens are downscaled. To see the full size, drag and drop them to your address bar.