Free and very cool city vectors.

http://www.iheartvector.com/2008/05/29/city-silhouette-vector/

http://bestdesignoptions.com/?p=2072

http://vector4free.com/vectors/id/100

http://www.freevectors.net/tag/City

http://sideduck.blogspot.com/2008/10/city-silhouette-vector.html

http://www.freevectors.net/tag/Landscape