Local local local local. Blewspace http://www.blewspace.com/ looks like a fairly new site that allows you to browse a map for blogs. There are only about 300 blogs listed at the moment, but it’s easy to register and add your own.
I suggest zooming in a bit on the map or you’re going to have a hard time telling exactly where the blogs are. Click on a marker and you’ll get a bubble with the name of the blog, URL, and a few words about it. If you don’t feel like browsing, you can also search by topic, author, and blog title.
Pretty small at the moment, but I like the interface. The blog mentions a lot of upcoming features, including RSS feeds…