Hey Jim, just came across this post. What with the spotty access to the forum of late, I haven't looked into all corners of our little space here for a while.
I have our skis stored horizontally on very simple homemade racks. These consist of two sturdy shelf brackets screwed into the basement wall studs, with a rough spruce 1x2x18 wood piece screwed to the top of each (basically some clean scrap lumber I had lying around). The brackets are spaced 32" apart (two stud widths), and the skis simply rest on top of the wood strips. Having 8 pairs, I have a double-decker arrangement, and these are mounted just under the ceiling to get them up and out of the way.
Total cost was about $15 for four brackets, and not counting the scrap wood.
Each pair is clicked together, base-to-base, which means one ski is resting binding down and the other is binding up. Not sure if over the course of 7 or 8 months of resting like that, the weight of the binding would affect the camber of either ski. I suppose if I was really worried about the skis developing unequal camber, I could flip them over after a few months. I haven't bothered with this, and have noticed no ill effects. If we had fewer pairs and thus more room, I would lay each pair side by side binding down.
Hope this helps. I can send pics if my description was a bit opaque.