I'm not sure what models have Bluetooth, but Bluetooth is a wireless remote connection method that allow wireless tools and applications to communicate in a wide range. The PS3 has Bluetooth and can connect with a PSP via USB and I suppose it may be possible to connect a PS3 and a PSP by Bluetooth as well, and in multiplayer games it might support bluetooth wireless headsets like the PS3. There might also be specific PSP accessories that use bluetooth, it is likely if there are any wireless accessories for the PSP, it would have to be Bluetooth.
