The Halo 3 Legendary Map Pack has been released for 800 MS points ($10). In addition to the three new maps, there is a free, brand new 360 theme and free gamer pics that centers around the map pack.

There is also a contest associated with the free gamer pictures. If you download the pictures and purchase the Legendary Pack, you'll be able to enter and win some rather nice prizes. Remember, downloading the pictures just isn't enough, you also need to at least play once on one of the new maps between April 25-April 27.

You can pick any of these items up via the Marketplace on your Xbox 360 dashboard.