MapQuest Map Builder BETA is a plugin tool for adding maps to your WordPress posts or pages. With version 1.0.1 you can easily add locations to the map via search, enter lat/long coordinates, or drop points directly on the map.
For each point added to the map, you can customize the map pointer icon, title and description.
MapQuest Map Builder inserts a map as either an embedded interactive map in an iframe or can also insert as a static image file.
Download: http://wordpress.org/extend/plugins/mapquest-map-builder/