Given the amount of people who own a 360 vs a PS3 and the costs involved in both it would be far more cost effective to go with microsoft if it where to happen at all, not to mention the PS3 is awkward to develop for, if you are new to it it could be a very long road ahead.
Also hasn't anyone considered the price point and how it would be delivered on a console? if you think about it microsoft arcade titles are on average 800 points, few pushing it to 1200 (like luminies was and the xbox original titles), 1600 microsoft points costs about $20, the game is retailing on pc for $30, so either the game would have to come down in price or it would have a high microsoft point price tag to match the pc version cost which would reduce its likely hood of people buying it.