I just got the iPhone 3g a few days ago, and I'm wondering what the data plan rates are. Is there one single price? I hear it's $30, but I have heard lots of prices; from as low as $15 to as high as $100. Basically, what I'm asking is, if I were to call AT&T right now and tell them I have an iPhone, what things would I need to get on it? Just the data plan? Is there a separate voice plan, too? If you know what's up, please let me know what the data plan rates are and what it ranges from. Thanks, guys.