(Pretty sure that won't be the final name.) Xbox 360 owners and those who already own RE5 for PS3 can also download this content. The PS3-exclusive 'Alternative Edition' is coming soon, and will include all the DLC listed below, plus compatibility with Sony's forthcoming motion controlling doohickey. As you'd expect for a title so popular, quite a bit of extra content is headed your way soon.
Resident Evil 5 was an early co-op hit this year.