I have not read through this entire thread so please forgive me if this has already been discussed. With winter approaching (or already here depending on your area) I found an article here:
http://weather.about.com/od/winterweather/p/winterdeaths.htm
regarding causes of winter storm deaths. It may make you reconsider including fire-starting supplies in your urban kit.

I'm in the process of modifying my Pocket Survival Pack to make an urban survival kit. I'm keeping the most important item in the PSK, the instructions. Though most of the information pertains to strictly wilderness survival, there is some information which pertains to all environments. The Spark-Lite and tender would come in handy. . . .