Google Earth Outreach was announced at the NY Googleplex today. Relevant links:
The press release.
A Google Earth Outreach discussion group has been set up, but so far I think by far the most useful part of the site is the new tutorials page, where you can download ready-made KML templates for placemark descriptions and instructions for turning spreadsheets into KML. Another find is instructions for using JEdit, a text editor that can be made to validate KML as you type (and it runs on OS X). (The placemarks templates are going to be a fantastic timesaver.)
Are you a “public benefit, US-based non profit with current 501(c)(3) status”? Then you are eligible for a free Google Earth Pro license. (It is restricted to US-only non-profits, but Google “reserve the right to make some exceptions.” I think it’s because there is no recognized global authenticating body for non-profits. So let your reputation do the talking.)