Did you know that you can collaborate with others as you create a custom online map? Google Earth Outreach offers a tutorial that describes exactly how to do this in Google Maps. Once you and your colleagues have created your map, you can export it to KML and view it in Google Earth.
My local mountain bike club is using this feature set to create a list of trailwork projects. Our collaborative map will show the location of needed trailwork and potential new trails we hope to build. I hope to share this soon with everyone, including the Forest Service.