A few weeks back I attended Web 2.0 in San Francisco. It was great seeing some old friends and meeting new ones but overall I thought the show wasn't that useful to attend (the free exhibition floor pass is the best way to go). Thankfully, the folks at O'Reilly have released a lot of the presentations here and I recommend sifting through some of them. What really struck me is this image from Ryan Sarver's presentation on Skyhook Wireless. It shows the density and quantity of WiFi networks in San Francisco - riches are awaiting those who can figure out how to really weave them all together. Fon is an early contestant but i'm sure that someone will ultimately figure out a way to make money of this.