Google-depression strikes again!
GeoURL is a location-to-URL reverse directory. This will allow you to find URLs by their proximity to a given location. Find your neighbor's blog, perhaps, or the web page of the restaurants near you. It currently only lists 181,117 sites, but you can add sites for free.
When mobile internet devices incorperate GPS devices, businesses will want this!
Super Future Prediction: This idea will be officially folded into Google Maps. (Unofficially, It has already been done by Leigh Dodds.)