I mean this "We have not announced release plans for Dawnguard on platforms other than Xbox 360 (available worldwide). As soon as there's any new information to share, we'll let everyone know.
Just feels like a punch in the face, seriously i have 700+ hours of skyrim for my PS3 over 20 charecter's iv made, and I just created 2 new charecters specificly for Dawnguard, one for the Dawnguard faction, and one to become a vampire lord. Each one has 100hrs on it. So please, something better then what Gstaff posted, PLEASE.