Three and a half crashes in seven years of commuting. In order of occurrence:
2005: I was irritated by a dump truck that pulled out into the street I was riding on right in front of me (like, couldn't he wait five seconds until there was no traffic) and then lumbers along at 5 mph. I hopped on the sidewalk to get past him, forgetting that the sidewalk has a sharper bend in it than the street at the upcoming curve. Went wide in the curve, fell in the grass, got up, rode to work.

2009: Drafting a coworker/fellow commuter on the ride home on the (usually deserted) bike path. There were two riders coming at us, riding side by side and taking up the entire path. My coworker and I kept riding, expecting the one on our side of the path to move over. Finally we realized that he has no clue that we're there. We both get on the brakes hard, but he weighs quite a bit less than I do so he can stop a bit faster. I left the path to avoid rear-ending him, and the bike went over on the soft shoulder. I managed to jump over the bars as the bike endo'd under me, so it fell but I didn't. That was my half crash. (The oncoming rider was very apologetic - he said it was his first time on a bike since he was a kid, so I went easy on him and just told him to remember that he needs to look out for oncoming traffic and other things in front of him.)

2010: Sprinting across a street to avoid a motorcyclist that decided to accelerate hard after I'd started across. Found a pothole that was apparently exactly the right size and shape to stop my front wheel - I never did figure out why I crashed there, but I suddenly found myself going headfirst over the bars. Landed hard on my arm and shoulder, went to the ER for X-rays. No broken collarbone (which shocked me), but I dislocated the joint between my clavicle and sternum. I'll have a funny lump there for the rest of my life, but no lasting pain or other negative effects, other than still being unhappy that I spent my son's eighth birthday in the ER instead of decorating the house for his party the next day. Totalled the bike - both the top tube and down tube were buckled, and I ran the carbon fork through the bandsaw before I put it in the dumpster to dissuade anybody from trying to salvage it.

2011: Front tire started to go flat right before the one sharp turn on my current commute. I didn't realize it was low until halfway through the turn when I needed to tighten my line slightly, and it suddenly slipped and dumped me unceremoniously on the ground. Lots of road rash and my thigh was black and blue from my hit to my knee, but no lasting damage. No damage whatsoever to the bike - not even a scratch on the paint. Note to self - slow down for that corner. It really freaked out the rider who was coming the other way and caused me to tighten my line, although to be fair there was nothing wrong with how he was riding or where he was positioned; I was just going too fast.

A few scary close calls (including bombing down a hill at 35 mph, expecting the light to cycle to green in my direction and not realizing that they'd changed the order of the signals earlier that day, resulting in me crossing six lanes of rush hour traffic at full speed - I still don't know how I managed to survive that one!), but no other actual falls.