So, I only briefly tried to add one of our map services (waterlines) to google earth. Our engineers and operation staff really like to use the street viewer. I thought it would be really neat if we could get our operational layers on google earth so that we can change any location issues with hydrants, valves, etc. But when I tried that it was unuseable slow, they showed up but took for ever. Is there a trick to getting the map services with kml capabilities to draw faster. Not sure if I am doing right or is that just the way it is with kml layers. Any help would be great. Thanks.
Not sure if this will help, but you mention your engineers and operation staff like the street view that Google provides. Could you use something like the WAB street view widget by Robert Scheitlin?