If you're keeping up with us lately, you've probably noticed our keen affection for photography over the last few weeks. With last weekend's opening party of our current Photo Show exhibit at M2 Gallery, and today's DirtyFeet introspective, we can't seem to get enough of these snap happy shutterbugs. Today, we're coming to you from Sin City. Our mission: tailing Houston-based Music Photographer, Mark Austin (a.k.a. MCA Photo). Austin has graciously invited Houstonist along to......