Here is a guy that has developed some great addons. The one I especially like is the one that takes you to every active Volcano on the planet it will also take you to all the historic Volcanos.
There are some other great addons too..
http://bbs.keyhole.com/ubb/showthreaded.php/Cat/0/Number/184008/an/0/page/0#184008
There are some other great addons too..
http://bbs.keyhole.com/ubb/showthreaded.php/Cat/0/Number/184008/an/0/page/0#184008