I'm preparing to go to New York for the NFL Draft, and I'm concerned that we may be without wireless service at Radio City Music Hall. In search of a backup plan in case the standard service gets giggy, I stumbled onto and joined the FON Network.
The basic idea is that with a small wireless device you can join any other person's FON network anywhere in the World. I'll let you know more as I delve into it. Right now, I'm pretty excited about it.
There seem to be a number of FONers in Oakland, including six within a mile of me.