Other phones -can- do MMS, but it's all so obnoxious no-one really bothers past the occasional pic. iPhone usage patterns suggest they -will- use it. A lot.
And AT&T is simply terrified of what will happen to their network if a few million 3GSs start MMSing pics and video around. More specifically: when they start MMSing non-iPhones.
Tethering is purely and simply a cash grab. They call their package 'unlimited' because truth-in-advertising laws in the US are weak. They charge more to tether because people will pay it. It's no more complex than that.
If you don't want to pay it, there are already apps to turn a hacked iPhone into a wifi access point. And I'm sure a bluetooth sharing app (less power drain) will be right around the corner.
And AT&T is simply terrified of what will happen to their network if a few million 3GSs start MMSing pics and video around. More specifically: when they start MMSing non-iPhones.
Tethering is purely and simply a cash grab. They call their package 'unlimited' because truth-in-advertising laws in the US are weak. They charge more to tether because people will pay it. It's no more complex than that.
If you don't want to pay it, there are already apps to turn a hacked iPhone into a wifi access point. And I'm sure a bluetooth sharing app (less power drain) will be right around the corner.