Silicon Valley's municipal wireless project is one of the most ambitious ever attempted, but good things take time -- more than proponents thought, in this case.

Organizers signed a letter of intent with a group of vendors including Cisco and IBM last year to build a 1,500-square-mile network. At the time, the group expected a rollout beginning in January or February of this year.

The fact that not even a pair of test networks is on the ground yet is a testament to the scale and complexity of the plan, according to Seth Fearey, vice president and chief operating officer of Joint Venture: Silicon Valley Network, which is pushing the plan. If the system takes shape as planned, it will let travelers stay connected throughout a trip from San Francisco's southern city limits to Gilroy, south of San Jose. Wi-Fi may be just one of eight technologies used in the project.

The high-tech region is reaching high while municipal wireless is going through a reality check. Last year a vendor dropped out of a project in Sacramento after expressing concern over a free ad-supported economic model, and in April EarthLink scaled back its municipal wireless activity to focus on existing cities and major opportunities. A high-profile plan for nearby San Francisco is embroiled in a political fight because some leaders think it is a bad deal for the city.

The Silicon Valley network would cover more than 40 municipalities across mountains, valleys and urban and suburban areas, with 2.4 million residents. The nonprofit Joint Venture group formed the Wireless Silicon Valley Task Force to spearhead the project, and last September it chose Silicon Valley Metro Connect to build and run it. Along with Cisco as equipment supplier and IBM as system integrator, Metro Connect includes high-tech nonprofit SeaKay and Azulstar. No tax dollars can be spent on the estimated $100 million project.

Metro Connect envisions a "layer cake" of perhaps eight wireless technologies, according to Fearey. Details are still being worked out, but they may include the following:

* Wi-Fi for central areas of cities.

* WiMAX mobile broadband at 2.5GHz for less populated areas.

* A public-safety network at 4.9GHz.

* DSRC (Dedicated Short-Range Communications) for vehicle communications at 5.9GHz.

The IDG News Service is a Network World affiliate.

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