Downloadable Content coming to Zombies!!! Xbox Live game

1800PocketPC has just noticed that Zombies!!! may be one of the first Windows Phone 7 games with downloadable content. lists the game as offering an expansion pack which will add 50 more gamer points and 5 new achievements, listed above.

1800Pocketpc expects the DLC to arrive in the next few months.  Hopefully this means Microsoft is close to solving the in-app purchasing issue for developers, a major source of revenue on other platforms.