Due to the fluid nature of the web, we can't guarantee these links will work past the original posting date.

Here's the site from New Zealand that I copied.

Lots of ranting about how to do 802.11 links up to 20 miles long!

This guy built his own Yagi antennas and tells us far more than we really want to know about how to do it. Notice the clever use of Pringles cans.

The Karlnet Web site in Dublin, Ohio.

Build a dish antenna for $10!

This server is running over a 10-mile 802.11b link.

Nokia's site for their Rooftop technology.

A ton of links about this stuff, including several community-based wireless networks already in operation.