I discovered myGME this evening whilst doing some gsak work/experimentation. This gsak macro allows you to get a google map of all the caches in your currently defined filter set with a radius circle predefined to show you the caches within that area. If you want to move the area, you select the red marker icons and move them to the center of the circle and the distance away from the center. It works great. Takes a while to load if you have a lot of caches mind.
The graphic below shows the initial output for the geocaches near Hocking Hills.
