With over 300 artists in the index, www.unurth.com is a great site to discover street art from around the world, captured in the past 2 years.
Some of my favorite street art comes from Banksy a London Graffiti street artist. www.banksy.co.uk His art shows up on walls around the world, and painted pieces have been known to fetch up to $576,000 US.




Last but not least here is
Aakash Nihalani, a New York artist. www.aakashnihalani.com



On his site
Aakash writes: My street work consists of mostly isometric triangles and squares. I selectively place these graphics around New York to highlight the contours and
elegant geometry of the city itself. I'm trying to offer the people a chance to step into a different New York than they are used to seeing and in turn momentarily escape routine scheduled lives. I think this is a great statement on why street art is so great. It gives a break from it all and allows us to imagine through the eyes of the artist. Its not in a gallery or on a wall in someones house. Its on our streets where everyone can see it, where it supposed to be so hopefully it can have that effect on us all.