In his Pavement Loop series, Alex Varanese continues to do perfectly-composed and wonderfully textured, saturated work. I'm sure you'll recognize his style from the extremely popular ALT/1977 Series of reimagined advertisements with modern devices.
Former San Francisco Supervisor and Independent Vice Presidential Candidate Matt Gonzalez is an accomplished and prolific collage artist. Working with found paper, he varies between subtle hints of the political and personal. Gonzalez is also the co-founder and frequent contributor to the San Francisco Collage Collective blog where most of his work can be found.