Ok... Christmas is upon me so it's time to finally decide: iPhone or iPod Touch? Can someone tell me how well an iPod Touch running fring works as a replacement for a cell phone? I'm almost always in an area with free wi-fi so that's not an issue. Can I call anyone using fring (that includes other people running typical cellphones or on landlines?) Can they call me from their cell phone (as in, they dial a number, same as they would call anyone on a cellphone, and it calls me?) Can I get voicemail on it? What are the limits? How much does it cost?