Finding Wi-Fi Hot Spots

There are a lot of sites that have maps to Hot Spots, the only problem is not all of them are "legal".
Under current laws you can use any open wifi network that does not have a WEP key or other means of keeping undesired users out. Even if you use the 80% usable Username:admin Password:password you are still breaking the law. But most people don't do that, an as such it is considered to be an open resource.
Wardriving for people who don't know is driving in a car (duh) with a wifi detector and looking for unsecured networks.

Most of these hot spots seem to be at cafes, hotels or airports - I'm kinda rural, and that's what's in my neck of the woods. I didn't look at any big cities to see if they are picking up off of corporations. Anyway, hotels, cafes and airports generally advertise that they have wireless access available - it's a selling point - so I wonder if the site is using this kind of data to generate their "hot spots".

There are at least two hotspots (Panera Bread and Borders Books) in the town I live in and neither was returned with my search. Hopefully they are still adding to the list. The funny thing is that I won't be able to access this site when I want it most - when I'm on the road and want to find a hotspot. It's better for those people (unlike me) who actually plan ahead.