Probably nobody monitors this thread anymore, but I got a letter from AT&T this morning saying they've detected tethering. I have an unlimited plan, but hit 3GB of usage last month, got a txt saying they're going to throttle my speed because I used more than 3GB, and then they must of been added to their "watch" list to check for tethering.
I read that PDANet hides tethering, but afraid to use it. I called AT&T and they said if they detect one more tethering activity, they will terminate my unlimited plan. Anybody know for sure it works? That is, after getting the warning email/letter from AT&T, has anybody switched to PDANet (from something like MyWi) and successfully continued with tethering?