AT&T has just announced that MMS -- a much-ballyhooed feature of iPhone OS 3.0 -- will finally be hitting AT&T on September 25. There's still no date for tethering, though the company is still saying that it'll be offered "in the future." Expanding on the logic behind the delay, they're saying that "by its nature, this function could exponentially increase traffic on the network, and we need to ensure that some of our current upgrades are in place before we can deliver the expanded functionality with the excellent performance that customers expect." We're no network engineers, but "exponentially increase traffic" and "AT&T" are two things we don't typically like to hear in the same sentence -- let's hope the 850MHz, 7.2Mbps, and backhaul u
