Almost got my bike stolen this week.  Right out from the loading dock area of our building.  Inside no less.  Whoever it was only had enough time before the automatic door would begin to close, like two minutes after someone had been allowed entrance, say a delivery truck.  One of the women in the office had her bike stolen the day before.  My bike was right next to hers and targeting since all I was using was a cable lock thinking no one would be able to get at these bikes.  I went down to get my bike for my commute home and when I did the combination and pulled the lock apart I was holding two separate pieces.  The cable had been cut and was only being held together by a bit of the plastic sheath.  Apparently the person got spooked or the door began to close and he had to get out without the bike.  So I have a homemade mega urban assault lock that I'm using until I can move into the world of Kryptonite ultimate security.

I also wanted to learn more on how people actually go about stealing bikes and the two best videos I found is one called "Know The Enemy" from the UK, a great animation done for BIKE OFF from the University of Arts London  and probably the most famous bike locking video with a more recent update with Hal Ruzal of Bicycle Habitat in New York and Kerri Martin, founder of The Bike Church in Asbury, NJ.  Take a look.
(http://www.bikeoff.org/design_resource/ABT_problem_who_steals.shtml)

http://www.streetfilms.org/hal-and-kerri-grade-your-bike-locking/