EarthLink's Wi-Fi mesh network is now officially up and running in Milpitas, Calif. The ISP and the city hope to generate initial excitement for the wireless municipal network by offering 30 days of free service.

The 10-square mile Wi-Fi mesh network is available to residents and visitors to Milpitas. Once the 30-day trial period ends, EarthLink will offer a monthly service, dubbed EarthLink Wi-Fi, for $21.95 per month. For people more interested in occasional use, EarthLink will offer a one-hour pass for $3.95 and a three-day pass for $15.95.

EarthLink has four municipal Wi-Fi contracts in California, including the now operational one in Milpitas. The ISP also has landed contracts to launch networks in Pasadena Anaheim and San Francisco. The Anaheim network went live in late June 2006, which marked EarthLink's first municipal Wi-Fi network launch.

The company also has city Wi-Fi deal in New Orleans and Philadelphia.