The Scribble Maps plugin allows you to easily add custom maps to your blog utilizing Scribble Maps.
Provides a full WordPress interface for embedding maps created on ScribbleMaps.com
Quickly and easily add links to your blog posts, which when clicked, starts up the Google Earth program at the specified location (lat/long).
UMapper makes it a snap to create engaging maps and add them to your blog posts. Features integrated map editor - no KML knowledge required!