ya the galaxy s3 supports the the ps3 controller natively and can get a app to use xbox360 controller with it too, was watching a video on it yesterday and had to buy the little Micro USB OTG Host Cable yesterday off of ebay so i can use my ps3 controller to play a little n64 games and what not
if anyone wants to watch it here is a link
http://youtu.be/46IiRyigUH0 (hope i'm not breaking any rules posting a link to a video)