And it was pretty much 100% my fault. I've been commuting by bike to work for almost a year now, and besides a slip on some black ice over the winter I've been blessed with the good fortune of only having a few near misses. All that changed this morning. I was riding on the right hand side of the road this morning, less than a block away from work when a truck passed me. The truck was towing a flat-bed trailer that was slightly wider than the truck itself and ended up brushing up against me as it passed and completely took my bike out from under me and tossed me to the ground. Luckily, there no cars immediately behind me and I landed mostly on my side. My only injuries were a minor elbow scrape, some road rash on my butt and the ruination of one of my favorite pairs of pants. The bike appears to be fine, except for some metal scraped off the pedal that hit the ground and a shattered pedal reflector.
The driver was aware/polite/law-abiding enough to stop. He seemed surprised that a) I had gotten up so fast, b) I took responsibility for the accident, "Sorry, I really shouldn't have been riding on the right between you and the curb like that, I should've just taken the lane...thanks for stopping." and c) I had a sense of humor and a smile on my face.
Anyways, be careful out there and learn from my mistake: take the lane as often as possible, and be as aware and observant as you can.