I recently upgraded to a Sony T68i to go with my soon to be perchased 12"PB. I was looking over the KB for Bluetooth info and came across this: http://docs.info.apple.com/article.html?artnum=86151 which describes how to use your BT phone as a modem. At the end of the article it says, ". Click the PPP tab and enter the information for your Internet service provider." Does this mean that I can use my normal ISP (SBC)? Or do I have to have a specific MOBILE ISP? What is the difference between this method and using GPRS?