Graffiti Artists

Calling all graffiti artists!  "Banksy" is a great British street artist, known for producing images on walls of buildings, sidewalks, fallen trees, bridges, and other imaginative places.  His messages are sometimes comical, and often political and social in nature.  Initailly an unknown, he has developed quite a popular cult following, and people are now flattered to have this phenomenal artist paint on their wall!  His first film "Exit Through the Gift Shop" opened at the 2010 Cannes Film Festival.  It is available on DVD in the US.

Do you know any famous American street artists?  If so...let us know!