Google has released a new free 3D modeling program called SketchUp.
It’s described as a tool to let “..you to create 3D models of houses, sheds, decks, home additions, woodworking projects – even space ships. You can add details, textures and glass to your models, design with dimensional accuracy, and place your finished models in Google Earth”
You can even share them with others by posting them to the 3D Warehouse where I found this image of the RoseBowl Stadium.
There is a pro version available for US$495.