Simon, organiser of most of the cycle rides I have done, has released a very good short film about cycling in Cambridge.
As a cycling commuter myself (80% of the time. If I don't use my bike, I walk), I cross the city every day.
It is a very well balance report of the existing (good and bad), the past, present and future of the facilities. Simon recognises the fact there are "cyclists" who don't care about lights nor cycling the wrong way (and due to their selfish behaviour they are unfortunately the most visible ones) but also that there are far more cyclists law abiding who suffer from the generalisation: Cyclist = dangerous law breaker. Specially when used as an excuse by police and local authorities.
Highly recommended!