Jorge Colombo's now-famous iPhone art (which has graced the cover of The New Yorker) has until now, only chronicled the streets of New York.  But now, the former San Francisco Magazine art director has taken his Brushes skills to the road, and the first city he's i-sketching is our fair San Francisco.  Give your apartment some SF love and snatch up his latest work: sketches of the Castro Theater and a downtown Muni train on Jen Bekman's 20x200.  And check out our interview with him on his new project.