The Google 3D Warehouse
is an online repository for both Google and user-contributed 3D objects for use in Google SketchUp, Google Earth as well as some other 3rd party applications
. Now Adobe Labs has released a plugin for Photoshop CS3 Extended
which "enables you to search and download 3D models from Google 3D Warehouse directly from Adobe Photoshop CS3 Extended." With Adobe working on making Photoshop CS3 Extended into much more of a 3D tool, this is a nice way to collect some 3D objects to work on.
The plugin itself is a free download,
but requires Photoshop CS3 Extended.