As part of the WWDC keynote on Monday, a few iPhone OS 3.0 features were announced that made people go “huh?” Why? Because AT&T wasn’t going to support them, at least at the start. In terms of new features, that would be MMS and tethering. AT&T spokesperson Seth Bloom told Ars Technica: “We absolutely will offer MMS on iPhone 3G S in the late summer, once we complete some system upgrades that will ensure our customers have the best experience with MMS. These upgrades are unrelated to our 3G network.”Now