Geocaching and Google Earth
I've come up with a way to link GSAK to Google Earth. In GSAK, do Tools, Options, HTML and add the following line at the bottom:
Now you can right-click on a cache and pick Google Earth from the Custom URL menu! Google Earth will pan to the new location but will not change the zoom level.
For you FireFox users, there's something even cooler! On this site you can find instructions on how to open Geocaching waypoints in Google Earth directly from Geocaching.com, and how to view Travel Bug tracks in Google Earth. It requires a free plugin for FireFox called GreaseMonkey. Sorry, I don't know of any such addon for IE users.