Uh oh, it looks like AT&T’s cell towers are about to be brought offline — though, one could argue they’re almost always offline — MacRumors is reporting that there is an option to set up tethering for AT&T users in the latest iPhone OS beta just released this evening. Though this could be a good sign, Engadget’s reports on AT&T’s comments on iPhone tethering a few weeks back don’t seem to set the mood so friendly. Let us know if you can get it going, will you?