An excited tipster dropped us a line today about AT&T’s network roll-out and, interestingly enough, a 3G iPhone rumor. Clearly this is grain of salt territory, but he’s saying that AT&T employees are being told that a 3G version of the iPhone is coming out soon — perhaps even as soon as Q4 2007 aka the Holidays. Popular opinion slated a 3G version for Q1 2008 or later.

He’s also saying that AT&T has done very little to their overall network to support the potentially increased traffic, which could be a bummer for those who don’t want to view the watered down Internet. Take it or leave it, folks.