http://www.jirigeller.com/

http://www.marcowagner.net/

Found at http://sarahannloreth.tumblr.com/

He has the most updated urban art blog that I have come across so far. Complete with sketches in ink and pen, Pat Perry has a very wide array of collection for his art pieces. He is inspired by whatever he sees around his home in Grand Rapids, Michigan while camping in the woods, or while he travels, meet people and be moved with music. Pat continuously creates surrealistic awesome artworks and sketches that people love because they show pure pencil talent. Art lovers dig his artwork online. He only uses Photoshop for color enhancements and manipulation but other than that, he sticks with pen and paper.