Oh. My. God. Google SketchUp is now free. And then there is 3D Warehouse, a (free) 3D content repository. I have to go to work now :-(, but meanwhile AECNews has all the details. Wow.
[Update 06:50 UTC: The official announcement.]
Notes on the political, social and scientific impact of networked digital maps and geospatial imagery, with a special focus on Google Earth.