Oh no, you are so busted! They are gonna take your phone from you! You are in so much trouble if they see this thread! They won't see anything on the bill though. It only shows how much data was sent/received, not WHAT data. Quit the myspace ya myspace junkie! In two weeks are we gonna see you on the myspace addition of intervention?
Nope, the bill only reflects how much use. Albeit, I would not use Edge for any surfing that may catch AT&T's attention. I would use wi-fi for that instead depending on the ISP. Just don't forget to clear the cache.