Would you like to be a part of a modeling project that encompasses an entire city? If so, the cities in this collection would like your help in creating 3D textured models for Google Earth. These collections contain 3D building footprints, and, in some cases building photos.
3D building enthusiasts - do your thing! http://www.google.com/intl/en/sketchup/3dwh/pdfs/modeling_a_city.pdf