Here is an updated list of U.S. cities and counties that have citywide Wi-Fi networks, and Wi-Fi hotzones. Included in the list are those that are planning large city wireless networks.
A word of caution from the author of the list:
“The list may not be as accurate as I’d like it to be. I’m hoping people will post comments to correct the entries. The section city and countywide projects are cities or counties that have issued RFPs or were building out the network in January 2008. This list may have to be amended significantly as many municipalities have decided not to go on with these projects.”