I've never really given urban survival scenerios much thought. I've mostly been concerned with dayhiking and backpacking scenerios. But this thread made me start thinking. So I looked at what I normally have on me - not because I consider it a PSK, but because it's just the normal stuff I carry in a small fanny pack. Now subject to review.

Kershaw Vapor, non-serrated
Leatherman Squirt P4
ARC AAA flashlight
Cellphone
Money (at least $20), Credit Cards, ID card
Aspirin, Tylenol, Advil in 35mm film container
2ft 2mm cord, 2ft 3mm cord (I tie knots as a hobby!)
256Mb flash drive (used more often than other things - to fix friend's virus/spyware infested Windows machines!)