OK, maybe a dumb question, but I have to ask.... I have wifi at home, no problem, but at work I have to use 3G.... my question is, when I turn the pad on at work, lets say on ibooks, am I using my assigned (2GB)amout of 3G? I know if I'm on the forum or eBay I will be, but if I'm on a dowloaded app, like ibooks, will I be using 3G time? If so, is there a way to temp turn it off? I don't want to cancel the 3G, just turn it off... sorry if this is a silly question, I did a search but didn't find what I needed... Thanks All.