Gaming news site Just Push Start also noticed the PS3 installment on the site of an Australian game retailer called, appropriately, GAME. We put more stock in the EA Russia listing, though we suppose the publishing giant is no stranger to sending mixed signals when speaking about the exclusivity of the Mass Effect series. We've contacted EA and BioWare to find out what the deal is.
Update: As some of you already guessed, the "deal" is that the EA Russia listing was, in fact, erroneous. The PS3 listing for Mass Effect 2 (and Left 4 Dead 2, which we didn't notice) has been removed from the site.