What a great idea. Oh, to develop for xbox 360 you need a developers account on their website(it costs), not sure about ps3. psp, iPhone is too slow. It would be a new game if it were to run on those.
navy996 the iphone wont be powerful enough. the psp has very little ram plus it'll need to be hacked. the ps3 is possible but again it needs to be hacked and that's only possible on fw3.41 and below. the xbox 360 could happen but it will be very slow and wont be free-ware any more becouse you'll need to pay to download it from the marketplace