@TUME: They are, believe it or not, models from Sketchup's 3D Warehouse. At the moment I don't intend on releasing any of them. Google warehouse seems to have a fairly liberal policy, from what I googled, in regards to using one's models. As long as they are not used for commercial purposes. There are numerous objects from Sketchup already on the DLS. Prime example is NAmenta's Los Angeles Union Passenger Terminal. I'm actually using that on my Surfliner project. Can't recall any others at the moment though.
I have, in the scene:
Flatiron bldg - New York City
Prudential plz - Philadelphia
Arch of Emperor Constantine the Great - Rome
Radisson Hotel & Suites - Forgit
25 Canada Sq(CitiBank) - London(Canary Wharf?)
Chicago Exchange Plaza - Chicago
Los Angeles MTA - Los Angeles
181 Madison Av - New York City