If you look on the right hand column of my site, at the bottom, you’ll see a little box that says “Geourl”. If you click on it, you’ll get a listing of websites geographically near me. If you “view source” on this page you can see a tag that has my latitude and longitude coordinates for my house. I got mine with a GPS but you can also get it from Terraserver. Just dump the tag on the top of your website then submit the URL to Geourl.org. If you live in North America, remember to use a negative value for longitude.
This is actually something I’d like to integrate in my travel site for each update.