BlogMapped!

BlogMap is a cute API that locates your blog geographically and shows how close local bloggers are. Its using Microsoft MapPoint, and it works with Atom as well as RSS feeds, so all those LiveJournal people can play with this, too. All you have to do is visit BlogMap and enter your blog address, and your geographical location, as vaguely or accurately as you prefer. They generate code you cut and paste onto your blog.