2K Games has told CVG that the company is "aiming for simultaneous release" of BioShock 2: Sea of Dreams on Xbox 360, PlayStation 3, and PC. The company didn't specify a time for this simultaneous release, but GameStop gives us a potential guess, at least for North America: October 5. Since CVG is a British site, we've asked 2K to clarify the region to which the article refers.
2K also told CVG that it would release concrete details about BioShock 2's multiplayer "soon enough," which is clearly not true, because we don't have said details right now. Or ... now.