Does a PS3 remote use Bluetooth or IR? I think the controllers are strictly Bluetooth, so I'm guessing the remote is, too. I think IR would be easier to deal with. Bluetooth can be finicky. (I've done a fair amount of programming reading a Wii controller on a PC--the Bluetooth can get very annoying to work with.)
I'm just getting into iPad development and might be interested in looking at this, but I'm still learning, so it won't be soon.