Jeff, one of my coworkers, is working on a rendering in ArcScene for a client. Using ArcGIS with Google SketchUp makes our lives easier, but so does the 3D Warehouse. Jeff found the perfect model to put on our Navy Air Installations renderings.
The search at the 3D Warehouse has become hard to navigate because people tag their models with just about everything (hence this Godzilla model appeared in a search for “Airplane”).