EA has told Eurogamer that PlayStation 3 listings for Left 4 Dead 2 and Mass Effect 2 were posted to the publisher's Russian website in error. They've since been removed.
Neither game had previously been announced for PS3, and neither of the games' predecessors appeared on the format.
However, there have been rumours about both for as long as they've been in the public domain. Left 4 Dead 2 seems the less likely of the two to appear, mind you, given Valve's ongoing protestations that it wants nothing to do with the PS3.