What did it take to convert another of our family of iPhone users from EDGE over to 3G? An attractively priced refurb unit—$99 for a white 16GB iPhone 3G. Great deal, eh? On July 26, we ordered one from AT&T’s web site with 2-day “priority shipping,” expecting it to arrive by Wednesday the 29th. Unfortunately, that didn’t happen; the iPhone proceeded to go AWOL in AT&T’s order status web site for 8 days,…