Development

Not to totally attack GSM, but GSM truely is toast. Saying that EDGE/UMTS were meant to work together is like saying that a GSM/CDMA(EVDO) handset was meant for it. Yes, it can talk to both networks,. but its two networks. When Verizon or Sprint rolls out EV-DO its over their network, the old handsets will work on the new network. When Cingular or T-Mobile or any other GSM carrier loads up their UMTS network the older handsets won't nessecarily work on the new tower due to the frequency difference.
Again, what you're saying is obvious, you stick two radios in your phone, EDGE and UMTS, and of course it'll work. But so will a GSM CDMA handset. That's not his point.