Not content to be bound to a particular wireless technology or even to provide Internet access, the Guerrilla.net group from Boston aims to keep the flow of information alive:
As pressure is asserted upon the Internet from insecure individuals in the US Government, an alternative network is needed to insure that the free flow of information is not obstructed, captured, analyzed, modified, or logged. This is the main purpose of guerrilla.net... The free flow of private information is a REQUIREMENT of a free society.
They host an impressive technical library, including information about building antennas, setting up point-to-point and public access links, and wireless technologies from UHF through 10GHz. They list several radio modes and even plans for a 6dbi omni antenna. They can be found online at http://www.guerrilla.net.