WiFi with your cellular?

Awhile ago one of the projects that the local geek group was trying to get off the ground was community wireless. Unfortunately, the land around here varies less than 10 feet per mile, so there's very little line-of-sight unless you own a few buildings or cell towers.

According to this, the U.S. cell phone companies are going to take advantage of their man-made advantages and get into the act, offering 802.11 wireless from the same towers that they offer telephone and PCS data from.

What's next? They aren't talking but if the above happens, how far is it to IP addresses for devices in your car? We're going to need IPv6 sooner than we thought.