I got an IM today from a YouTube viewer asking me if the iPhone 3G was available on an AT&T family plan. And you know, I couldn't remember. So I looked it up and figured, if DRZmoney isn't sure, someone else out there probably isn't sure, either. The answer is yes, and here are the details - basically it starts at $130/month for two iPhones sharing 700 minutes and unlimited data. Additional lines are $40/each:
You can get details on all of AT&T's iPhone-compatible plans right here.