I plan on buying the new iphone when its available however, I have a two part question for those in the know: 1. I assume number porting to the iphone is a non-issue but I dont know anyone that wasn't already an AT&T customer. 2. (And more important) Should I switch over to AT&T, purchase a junk phone until the iphone comes out so I can get the "rumored" subsidy? Thanks!