The official Google Earth Community bulletin board is a great resource… except that it lacks RSS feeds. So my feature request for the next site upgrade is an easy way of staying updated on happenings there from within my RSS newsreader. The software that runs the BBS, UBB.threads, supports a third-party plug-in called rssFeeder, so it’s doable.
In the meantime, I’ve gone ahead and made a feed for the Keyhole News thread using FeedFire. You can get the RSS from this page. This is the place where new data announcements tend to be made, so it’s worth keeping an eye on it.