MyBikeLane is an interesting concept in distributed social law enforcement. The idea is that people take photos of cars parked in bike lanes and then upload those to the site along with details on when and where the incident occurred. Since they can be sorted by license plate, the worst offenders can be easily identified. New York has by far the most active community, followed by Toronto.
Since I carry a digital camera at all times anyhow, I will keep my eyes peeled for possible contributions once I resume biking. For now, my small hybrid tires and the recollection of my nasty Halloween fall are keeping my bike in the basement.
I learned about the site from this interesting blog.