Oddly enough, the main upside of the proposed T-Mobile USA / AT&T tie-up is coming to fruition, despite the fact that neither carrier will be merging into the other. We'd heard shortly after the breakup that both operators would be agreeing to a seven-year roaming deal, but hadn't noticed any specifics on it until now. According to T-Mob's parent company Deutsche Telekom, the two have come to terms on a UMTS roaming agreement for the US (read: no international deals here), which will "allow [T
