Due out in March 2009, the Walls Notebook is nothing short of a genius idea. It gives you clean New York city walls on which to draw, paste or doodle to your heart's content. You can now be a badass graffiti artist from the comfort of your desk at work.
It is also an affordable piece of street art-related joy at $16.95. The only problem I can see is that you won't want to draw on it!