Very nice setup!
I have a similar deal; I carry a PSK with me, but for places where trouble might be (car, hiking in the woods, etc) I'll carry a waistpack that's basically an expansion. My PSK can't carry shelter; the expansion pack can. You get the idea <img src="/images/graemlins/smile.gif" alt="" />
Congrats on packing all that stuff into the altoid tin! This may be 6 one way, half a dozen the other, but I'd recommend moving the LED to the waistpack and putting a smaller one in the tin. Since the tin is what you carry more frequently, and the waistpack only sometimes, it's important to squeeze as much stuff as possible in there. There are smaller LED's that'll do the job of a basic light, which means you can stuff even more into the tin. One example is the micro lenser LED. At only around $10 (US distributor: coast) It's extremely thin diameter wise. (black one in the middle)
http://img.photobucket.com/albums/v234/Burncycle/stuff/scale.jpgIt's red LED will let you find your way around your gear in the dark without destroying your night vision as well.
The tin itself is fire heavy (good!) but signal light. I know the commercial signal mirrors usually don't fit into an altoids tin sized kit, and they're usually pretty thick anyway, but try and find something that you can substitute. A mirror is important, not just for signaling but for personal hygene. Check out the mirrors in womens compacts- they're usually small and thin enough to stuff in there. Personally, I use a mirror that I aquired as a promotional item. It was one of those nifty things that companies give away with their brand name on them. The brand name was on the rubber holder the mirror sat in; I ditched that, and stuck the mirror in the tin with a piece of tissue over it to prevent scratching. It is glass, so breakage is a concern, but in the tin things don't move around too much and you do have the bigger mirror in the waistpack. The tin lid can serve as an improvised signal mirror, but it's nothing like a real one.
Fitting 10' of ductape in an altoids tin sized container doesn't sound easy! You'll find it useful I'm sure. Consider carrying some safety pins and heavy duty needles as well. Thread you'll find in the inner strands of the #500 cord. Don't forget you have to burn the ends after cutting the cord. A mini bic would be useful for this; sometimes we get so caught up in redundant ruggid firestarting tools that we couldn't even light a cigarette if we wanted to, unless we spent 10 minutes starting a fire to do it; and one shouldn't waste a match burning ends of cordage especially since you may have to do it many times as you go.
I don't know how you close the tin, but if you use a couple of ranger bands then you have even more tinder for fire <img src="/images/graemlins/smile.gif" alt="" />
The SAS compass is great. That probably cost you quite a bit of money too. It's only useful for general headings though; I suggest packing a topographical map of whatever area you will be in and a more capable compass in the waistpack. A silva ranger is small and seems to be of benchmark quality, and maps fold rather flat.
In your waistpack, consider carrying an extra space blanket and/or emergency poncho if you can fit it. You might not be able to though, that looks like a thin space from the pictures and there is already a ton of stuff in there. Still, you can never have too much shelter, and can always find uses for them. If you have overhead shelter with the tent, and a ground cover, you can always use one of those emergency ponchos to wear, or to collect rainwater, or some other task. Small coffee filters are good as well; you can filter water before you treat it getting most of the crap out. Or, if you want to pursue this route, there are water filter straws out there, but I don't know how well they perform.
Medium sized clear trash bags with ties are always useful. Tie them around tree limbs and get some water out of them, or make a solar still, or lay them out to collect rainwater. You don't get too much water the first two ways, but if you have 10 or so going at one time it can help. At the very least, setting them up and checking them gives you something to do, which can be a boost to morale.
You're very slim on the bug department. You might want to carry bug repellant wipes. You can survive for 10 days probably, but they don't have to be miserable! They're flat, and you can stuff quite a few in there. Same with sunscreen packets-
If you are living near water, gil nets are inexpensive and compact- enough so to fit in the palm of your hand and can be squeezed and crushed into tight places. Same with trout lines, although it's easy enough to improvise a trout line with 500 cord and some fish hooks with leaders. These aren't legal in some areas, but if you're trying to survive they can help you out of danger first, then [censored] at you later <img src="/images/graemlins/wink.gif" alt="" /> this lets you aquire food while you go off and do other things. You won't starve in 10 days, but it will kill your morale and make you weak if you're busy thinking of food rather than being busy surviving. Speaking of which, I'd carry the cell phone some other way and stuff an MRE ration bar in there (the kind the pilot use). They aren't supposed to be thirst inducing, so you can nibble on it in the time between getting stranded and catching natural food like fish.
Depending on your climate, a few of those chemical hand warmers might prove useful too. In desert (or even snow) you might also want to stuff some of those paper/plastic sunglasses optomitrests hand out after dialiating someones eyes. These fold flat (like the 3d glasses) and can prevent snow blindness. A vaccum sealed sponge will also be useful collecting dew water
Any reason you decided against a wire saw or something similar for cutting thicker pieces of firewood?
Just a few suggestions, I'm not an expert nor do I have very much experience... but I hope I've given you some ideas <img src="/images/graemlins/smile.gif" alt="" />