As I'm sure your all surprised another exclusive DLC is coming to other platforms, nothing is exclusive these days. Ausir reports;
Finally the news a lot of you have been waiting for. Bethesda Softworks has announced that on Tuesday, February 22, the Dead Money add-on for Fallout: New Vegas will be released for PlayStation 3 (via PSN) and PC (via Steam and Direct2Drive).
Furthermore, three additional add-ons will be released in the coming months, and will be available simultaneously on all three platforms. While not officially announced yet, we already know their titles from Bethesda's trademark registrations - Honest Hearts, Lonesome Road and Old World Blues. You can find a summary of hints at their content in the game itself and in Dead Money in this post.
I still haven't played Dead Money for my xbox but I've already heard that it's better than all of Bethesda's add ons by far.