BioWare pretty much pointed the finger right at Sony when they explained last week why PS3 owners couldn't partake in the Mass Effect 3 multiplayer challenges.
Sony in turn has now stepped up to the plate and assured PS3 users that they are indeed working with BioWare to rectify this matter. A Sony representative told Shacknews in a very vague manner, "We are currently working together with EA and BioWare on an implementation to bring Mass Effect 3 multiplayer weekends to PS3."
So there you have it; not much of an answer to anything at all except for a "we're working on it," which I suppose is better than saying "up yours, suckers" to PS3 owners. Stay tuned to this Bat Channel for updates on giving PS3 players a piece of ME3 multiplayer pie.