Google Earth is out. Requires a fast Windows PC. Three subscription levels, the basic one free. More once I’ve had a chance to look through the site; post your take in the comments. Via Google Blog.

See previous entries: Google Earth Preview; Google Factory Tour: Google Earth, Map API?

Update: Looks awfully comprehensive, with support for GPS waypoints and user data on the middle-tier ($20/year) Google Earth Plus service. 3D buildings for 38 U.S. cities. Integrated with Google Local search. How soon for the Mac version, folks?

Another update: Directions has a first look.