Hello guys I have an iPhone and a data plan with att. Today I decided to install BETA 2. So while in town I decide to use skype used it all day amazing software. And I am looking at my IBM THINKPAD T61 with its built in 3g modem and I decide to do an experiment. I take out the iphone's sim card out and pop in the DATA ONLY SIM from at&t and lo and behold my iphone works. Of course no voice data but I am able to browse the internet and since I WAS ABLE TO BROWSE THE INTERNET i figured hey let me try SKYPE. And what do you know I was using my iPhone with a data only sim card using skype all day to make phone calls. How amazing is that? I paid skype 29.95 for a whole year of unlimited landline & mobile. Would be awesome if it stayed this open. But we all know is temporary.