Google has announced the first international Google Model Your Town Competition and invites people to use free sketching tools to create a 3D portrait of their community and ensure its place on the 3D world map.
Buildings can be modeled with SketchUp, a free 3D modeling program from Google or using Building Maker if your town is located in an area where Building Maker data is available. Each completed building model should be uploaded to a dedicated town collection on the Google 3D Warehouse. Submit your entry by March 1, 2010 and win lots of prizes … including USD$10,000 for the town’s public school district.
Here are some example towns that are modeled in 3D for Google Earth.
This video will show you how to get started