I just entered a 2 year with AT&T, 200mb/mo data plan. While I keep Cell Data off, I am looking at how I can avoid going over. I have an idea to set 3G to OFF and leave it on all the time. Naturally this goes to EDGE speed which is tiny (1/10th??) that of iPhone 4's 3.75G speed (4 can go a heck of lot faster then just 3G). So far I am seeing about 1.4mb / day. Any other tips out there?