AT&T Wireless said it is offering its 3G network in Dallas and San Diego: San Diego should be a particularly interesting market as it will be the first in the country to have competing 3G services--Verizon Wireless already has its EV-DO network live there. It will also be interesting to watch if the two networks seem to have any affect on Wi-Fi usage.
On a side note, AT&T Wireless cleverly uses the term "metropolitan hotspot" to describe the service in the two markets. That term is usually used to describe the stringing together of Wi-Fi hotspots to cover a large region or by WiMax-like technologies that aim to blanket a city. It's really a stretch to compare the AT&T Wireless service to Wi-Fi. AT&T Wireless says its network offers 220 kbps to 320 kbps, with bursts up to 384 kbps, while even 802.11b, depending on how many people are sharing a network, usually can deliver multiple megabits of throughput.