How about just the Apple iPhone? I think that, if and when it is released, it will get more coverage that a VoIP phone from Cisco, and i think we shouldnt change what we call it. If you wanna talk about the Cisco one, say that thats what it is.
But this could cause a bit of a dillemma in some places...
Sure, but I think both are kind of bad names.
iPod Mobile - The iPod is just as mobile as the iPod Mobile would be.
iChat Mobile - This would really only make sense if iChat was given some sort of phone integration, to allow you to call people on their phone lines.
It will take on the iPod brand or the Mac brand, none of the others like iCell (no one in europe calls it a cellphone, over here it is a mobile) or iCall, iTell will have a chance.