You would be amazed... Even today, there are so many unprotected WiFi hubs it's insane. Just a few years ago, I could sit at the corner of Market and 3rd st in SF and hit about 20 WiFi nodes, and one node had about 20 Macs that were totally open. I could get total access to all the files on 20 macs on that nwtwork. Me thinks it was a Multi-media company, it had source code, and a lot of other seemingly sensitive files. Now, people are getting a clue and at least putting passwords on their hubs...

At heathrow in London, it's FULL of Open WiFi hubs, just the place to get online and check your mail while waiting for a connecting flight.

Berlin CCC (Chaos Computer Club) had WiFi in all the popular parks, all free and open to the public. A password is required, but if you know just ONE member of the CCC, they'll give it to you.

Crunch