Didja catch the 'non-answer' answer to: Are there advantages to having the iPhone on multiple (U.S.) carriers?
He said: There might be.
Everyone thinks Verizon gets it....someday (many think by 2011).
I'm hoping the fact that it would only take a tweak of radio frequencies in the GSM band to reach T-Mobile is the deciding factor. Plus, TMo working on all that HSPA+ speed in the network.
After the WWDC show (yesterday) with 'FaceTime' video calls demo'd, I really think TMo can help spread some of the bandwidth AT&T surely can't handle.