EDGE is AT&T Wireless's 2.5G service. Over at Wi-Fi Network News, Glen Fleishman reports that AT&TW is claiming that 6,500 cities are EDGE enabled.
Uh, hunh.
Not cheap at $80/month, plus $150 for the network card to start, but at least it's in range of early adopters.
Maybe the US will get to decent cellular data in my lifetime.