To experiment GeoRSS feeds in Google Maps, point http://pg3.ucs.indiana.edu/cgi-bin/gm_getPolarGridFeed?entries=10 in the search bar, and click on "Search Maps". The value for
entriesis adjustable with the maximum 64 limit imposed by Google Maps.
To play with KML in Google Earth, point "Add->Network Link" to http://pg3.ucs.indiana.edu/cgi-bin/gm_getPolarGridKML?entries=10, where
entriesis similarly adjustable. The KML works in Google Maps too.