would that be possible?

which wireless controller would be best and work without hacks (like having to own a ps3 or psp, just buying 2 remote controllers)?
would for example two like this work on the same N900 (connected to a big screen with TV-out) ? Chainpus BGP100 Bluetooth GamePad
does the emulator support multiple players?
(I was excluding the zeemote since it has too less keys, and that would work for some games maybe, but with others it may not; plus, holding a controller with two hands is better for playing)