Over the weekend my best mate Rich went looking for wireless networks in our home town Perth with a few friends. Not content to use the normal methods he took his plane out for a spin (see Flight Club). They have some great photos of the event, and you can have a look at the logs at the e3 web site. They discovered 95 networks, no mean feat for a small one million resident city. Included were hotels, government departments, well known public companies, private home networks, and ISPs. Highlights wireless security again.
It has since been discussed on Slashdot.