Source:
http://www.sketchup.com/?sid=368What's the difference between Google SketchUp (Free) and SketchUp Pro 5?
Pro users are able to print and export raster images at higher-than-screen resolution.
Pro users have access to the following 3D export formats: DWG, DXF, 3DS, OBJ, XSI, VRML and FBX.
Pro users are able to export animations and walkthroughs as MOV (Mac) or AVI (Windows) files.
Pro users get the Sandbox Tools (for organic modeling of terrain, etc) and the Film & Stage Tools (for pre-viz work).
Pro users have access to the Pro Users' Forum
Pro users have access to free email tech support for two years after they buy SketchUp Pro.
Finally, only SketchUp Pro is approved for commercial use; the Free version is licensed for personal use only.
On a side note,if you can find out where you download the damn thing,let us know.Here ya go
http://sketchup.google.com/20 mb download
http://dl.google.com...ogleSketchUpW-EN.exe