Agreed; other than visual voicemail and perhaps indirectly forcing AT&T to upgrade their 3G network by making data plans attractive to the masses, how has Apple

Agreed; other than visual voicemail and perhaps indirectly forcing AT&T to upgrade their 3G network by making data plans attractive to the masses, how has Apple swayed AT&T? They don't allow tethering, and Apple is not really putting pressure on AT&T to change their ridiculous (not compared to other carriers, but compared to common sense) charges for overages, text messages, etc.