The Bethesda Blog announces that the Xbox exclusivity of the Dead Money DLC for Fallout: New Vegas is concluding, and the pack will be released for Windows via Direct2Drive and PlayStation 3 via PSN on February 22. They also announce plans for three more DLC packs which will launch simultaneously on all three platforms:

This morning we’ve announced that Dead Money, the first game add-on for Fallout: New Vegas, is coming to PlayStation 3 (via PSN) and PC (via Steam and Direct2Drive) on Tuesday, February 22nd. Additionally, we will be releasing three additional add-on packs in the coming months. These packs will launch simultaneously on Xbox 360, PlayStation 3, and PC.

More details to come.