The term is all over PC World's blog entry
reviewing a panel on location and the Web at MIT's
Emerging Technologies Conference last week.
I think the post is about this session: Second Earth: Virtual Worlds, Amazing Maps, and the Future of the Metaverse though it doesn't seem to be on the topic of geotagging, where the post focusses. One tidbit from Google's John Hanke:
Hanke says Google has begun to try to index all GeoTagged content on the Web. So far, he says, Google has cataloged several million pieces of content.
I don't really know what that means!