I have a jailbroken iPhone 3GS on AT&T and I was just wondering if I use MyWi in order to tether my macbook while I'm not at home, will AT&T be able to tell and charge me a lot of money on my bill? I know that tethering isn't officially supported by AT&T yet, but my data plan for the iPhone is unlimited, so even if I tethered my computer, wouldn't that data still fall under the unlimited plan for my iPhone? I just would like to know if there is any way AT&T can detect if I'm using my data plan to tether with my macbook, and charge me a ton of money for it, or if tethering is safe to do with the iPhone on AT&T. I would like to be able to use MyWi to provide me with a way to get internet on my macbook anywhere, but if AT&T can find out and charge me a ton of money for it, then it's obviously not worth it. Any input would be greatly appreciated, Thanks.