I'd consider myself a heavy iPhone user, and yet the most data I've ever used in a month is 175MB. Why?
* My email is set to download manually. * I buy and purchase apps and music using the computer instead of over the 3G. I update my apps over the computer as well. * I don't stream music, and I don't use YouTube very often.
Despite the fact that it's not uncommon for me to be surfing the web on my phone for more than an hour a day, I've never come close to the limit. For me, not only am I going to save $15 a month but the service is going to get a ton faster too. How can anyone consider this a bad thing? Just plug your phone into the computer when you want to update your apps, and that's pretty much the only change most people will need to make to save $15 a month.