Sounds like you have a good start and have received a lot of good suggestions.

Some other things that I always have for fixing everything:
Duct tape ( flat roll of about 30 ft is easy to carry in a coat pocket or pants pocket.)
Heavy coat-hanger wire (not the flimsy white painted ones but the heavy green ones)
Strong nylon thread and needle (some prefer dental floss over thread because it has more uses)
Zip-ties - Get a wide assortment of lengths ( These will make expedient shelter truely expedient not to mention a million other things that don't require the thermal properties of the coat-hangers.)
Vise grips
Leatherman wave or other plier equipped multi-tool
Big contractor grade garbage bags
Gallon ZipLocks
Cordage (this is soooo handy that I always carry 200 foot of cord with me fits in my other back pocket to balance my fat wallet)

I find it helps to think in terms of needs and scenarios.
Needs first because they are very similar in all scenarios

For urban settings this seems like a decent list of things you may want to add and may be a good price though I haven't finished my comparison shopping yet.

Water
You can only carry so much of this - it is heavy. You can store quite large quantities though and should. If you are staying at home you will want enough for consumption and hand-washing as a minimum. You can probably forego bathing for a while. The general recomendation is between 1 and 2 gallons per day per person. More if you will be dealing with extreme exertion or extreme heat. You will run out! Faster if you are on the move but you will run out. Have a means of purifying water. A good filter is best when combined with boiling. Chemicals for disinfecting water are decent against bio hazards but useless against chemicals. Boiling requires a stove and fuel. Filters will clogg at somepoint but a decent one will provide tens of thousands of gallons of filtration.

Shelter
If you are staying at home this is taken care of. If you can take your vehicle then you have something but might want a tent as well and a destination. If you are walking you will want something light but adequate - minimal would be a contractor grade large garbage bag.

Food
if your food will need cooking then this category will also require cooking and cleaning supplies - this greatly complicates things. If you need to cook in an apartment building then you will have to add fire suppressants to your needs ( not a bad thing to have around for other reasons) Acquiring food in an urban setting is not as easy or as well received by your neighbors as in the country. Hunting with a .22 rifle you could probably harvest your fill of pigeons, gulls and squirells in an urban park for the first few days until everyone did it and then nothing would be left. But you would probably be removed form this activity immediately by concerned citizens or LEO's. OTOH a simple box trap and some popcorn/crackers/crusty bread/other available garbage and you can quietly gather all of the above types of food in a corner of the park that might be less visible and no-one would be concerned.

Go to a park some afternoon and practice traping and releasing with a simple box trap. As long as you are not killing but traping and releasing you will probably not run far afoul of the LEO's doing this. (box trap design - Card-board box about 10" cubed, stick proping up one end with string attached for you to pull, popcorn bait for pigeons and nuts for squirells. put the bait around and under the box and wait. The domesticated pigeons and squirrells will blithly wander under the box after the bait and you pull the stick. Not so hard.) This doesn't work in rural areas because the animals haven't been domesticated and are suspiscious of humans trying to feed them under a box.

Miscellaneous tools
This is where the fun comes in. Generally a SAK or leatherman will be helpful. You will also want a can opener and spoon. Even if you didn't stock up on canned foods you will probably be able to find some in the rubble if you are in an urban environment. If the can is un-opened then it is good. If you are in an urban environment the wire saw will not be as useful as the crow-bar / wreking bar. Bolt cutters and strong wire cutters capable of opening chain-link fencing would also be helpful. (I am not suggesting burglaring but rather when buildings collapse you may need to exit through obstacles such as locked doors and fencing.) In a rural environment the crowbar should probably be replaced with an ax or sierra saw and the bolt and wire cutters may be left behind (unless your scenario includes either SAR or opportunistic re-supply)

And the list goes on. The important thing to remember is that the needs are always the same and that tools are complementary. If you have no stove the cookpot isn't as necessary. If you are using an alcohol stove in an apartment you'd better have a fire extinquisher. Snares are useful on squirells in most urban and rural environments but it helps to have a knife for skinning and a stove for cooking or the process will be very primitive. If your scenario includes getting out then you need to spend much more attention to the news and be prepared in your vehicle to just jump in and go. This means maps, plans, destinations, adequate vehicle. If you don't have a place to go and a vehicle that can go off-road a bit to get around obstacles and a map and directions for alternate paths incase the normal one is impassable then don't bother considering the equipment needed to evacuate. What you need is the stuff to get noticed by those who are organizing evacuation so that you can hitch a ride earlier rather than later. First things first. The Ham radio, Air horn, whistle, and signal mirror are much cheaper than the Jeep Cherokee and require much less up-keep but they will not drive you out before the disaster. Fema will come get you if they can find you so you will want the radio, horn and whistle. If you have the jeep you might be out before the problem if you can read the signs in the news well enough or have your own private inteligence network - (TFDB and Black Helicopters)


OH, DON'T FORGET THE PLASTIC SHEETING AND DUCT-TAPE! <img src="images/graemlins/wink.gif" alt="" />