I think you should allow the PC to access the Iphone servers...Delteria is currently in the works to be an iphone server so we have been testing both aspects of Iphone and PC and its just a smaller screen. If you build the server properly you can phase out these "dis-advantages" tapping a sword button on a screen is the same as mashing the A,S or D button on a computer is it not?
-If you form the systems where the computer players can't switch weapons or do things faster than iphone players then youre not really cheating anyone.
If anything...if you allowed the idevice and pc community to integrate you'd only bring more players to the PC...and probably find more developers for the game. What would be better if someone was playing on their Idevice on a bus then got home was able to log off and then log on to the SAME account on their computer...just for larger play...