If you're looking for additional tasks for Explorer, and especially if you're looking for their source code too, then don't forget to check out ArcScripts. ArcScripts has long been a valuable resource where the ESRI user community and staff share code.

Currently there are eight entries for ArcGIS Explorer tasks (complete with their source code). Just open the ArcScripts Web site, and choose ArcGIS Explorer from the software list to view the submissions. Click on any entry to view additional detailed information, or to download it. Remember, these are unsupported...