The
Wooser Collective is a online collection of submissions of street art from around the world. If you are looking for inspiration or some crazy creative street art, this is the perfect website for you. You can subscribe, submit or browse the archives and do notice that everything isn't created by famous people. I found the "Chalk" section under categories to be most entertaining.
"The Wooster Collective was founded in 2001. This site is dedicated to showcasing and celebrating ephemeral art placed on streets in cities around the world."