GeoURL
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.
GeoURL meets Google Maps
Leigh Dodds made a super neat GeoURL to Google Maps converter using the RSS feeds.
Flickr Geotagging
"Ive come up with a method, that makes adding GeoTags to your Flickr images, and then submitting the images to the geobloggers.com site a slightly more automated process."
Geotagging Flickr with Google Maps and Greasemonkey Part 2
del.icio.us Geotagging
Formats
also see Maps, Social Software, Wikipedia:GeoTagging