I certainly understand the sweaty-foot problem. What's it been hitting, 120 in the shade most days? But solving it won't be that easy. A lot depends on what kind of socks you can get in hand. I'd actually recommend something in the wool spectrum because wool socks do the best job of soaking up sweat (the wool fibers have little pockets in them that hold water). My guess is that your basic black socks are military issue, and while not of the worst quality, they won't be as good as you might get on the civilian retail market. So if you can find some, get two or three pairs of SmartWool Expedition Trekking socks ($17; www.rei.com). These are good-quality socks with lots of the high-end Merino wool that you want. Pair them with liner socks made of CoolMax or some similar lightweight, wicking, fast-drying material. And get enough pairs so you can dry them out for at least one day, preferably two, between wearings.
You might also try to reduce the sweating itself. Spray your feet with an anti-perspirant each day before donning socks and boots. You'll be surprised at how much that cuts down on foot sweats!