The good old BCB survival kit, same as what started off my PSK. Your kit is very similar to mine so I'll let you see what I've got in mine in case it gives you any ideas:

Flint and Striker
10 B.C.B. Waterproof Matches and Striker
3 Cotton Balls (Tinder)
8 Plasters
2 Non Adhesive Dressings
1 Mini Bandage
1 Cyberlight LED light
1 Snare Wire
1 Wire Saw
50 Iodine Tablets in vial
1 Fox 40 Whistle
1 Fishing Kit (Standard BCB)
1 Sowing Kit (Standard BCB)
1 Button Compass
1 Sheet Alluminium Foil
1 Signal Mirror
2 Antiseptic Wipes
5 Safety Pins
1 Condom
All in BCB Tin with Paracord wrapped arround it

Am afraid I don't have a picture as my digital camera isn't yet hooked up.

The only things I would say that spring to mind are,

1) An LED light or some other form of illumination is very very useful
2) A sugestion for a better whistle is the Fox 40, or Life Adventure produce a mountain survival whistle which is pretty good.
3) Chlorine based purification (which puritabs are) isn't as good as Iodine based ones, but puritabs take up such a small spacethey are still pretty good for a PSK.
4) A spark-lite is apparently a beter firestarter than the flint and steel (which looks the same as the one 've got in mine) but I've not seen them for sale over here in th UK

Can't think of anything else immediately. Out of curiosity do you carry this all the time? For me the tin is a bit bulky for EDC so I normally only pack it if I'm doing something specific. For EDC I have:

In my Wallet (along with money and cards):
In a little nylon puch (credit card sized in one of the slots):
10 B.C.B. Waterproof Matches and Striker
8 Water Purification Tablets (Aquaclear Purifying Tablets)
1 Wire Saw
1 Length Snare Wire
1 Button Compass
1 Needle
2 Small Fishing Hooks
2 Medium Fishing Hooks
1 Length 22lb Fishing Wire

Elsewhere in the wallet I have
5 Plasters (Different Sizes)
2 Antiseptic Wipes
1 Sterile Non Adhesive Dressing
1 Swiss Army Card with
Magnifying Glass
Tweezers
LED Light
Pen
Screw Drivers
Letter Opener
Scissors

On my Key Chain:

1 Cyberlight LED Light
1 LifeAdventure Mountain Survival Whistle

And on belt a Leatherman Wave

And that goes with me everywhere along with my mobile phone and palm top computer.

Don't have the space in pockets for a big bulky tin.