John Gruber with some strong commentary on AT&T’s apparent inability to support the needs of iPhone users:
Apple slagged AT&T twice during the WWDC keynote, for their inability to offer iPhone users either MMS or tethering. These are not advanced cutting edge mobile phone features. That was seven weeks ago, and AT&T still hasn’t said a peep about making either feature available. Of course Apple is furious. They are dependent on an incompetent partner in their biggest market.
The AT&T relationship, now a curse, started as a blessing for Apple. At the beginning, Apple was able to negotiate pretty liberal terms with AT&T which allowed for features like the App Store and Visual Voicemail, which may never have happened with Verizon. It also provided a large-enough audience for the platform to be such a success, which may not have happened with a network like T-Mobile or Sprint.