This question is burning me, so I have to post.
I just reread two aricles:
http://www.backpackinglight.com/cgi-bin/backpackinglight/single_wall_shelters_condensation_factors_tips.html
http://www.backpackinglight.com/cgi-bin/backpackinglight/night_time_condensation_on_tarp_and_tent_fabrics.html
My idea is that by maximizing condensation we can produce distilled drinking water. This would work only in tents with very steep wall such as mids and twin sisters designs. Condensation will run down the wall instead of dripping and can be collected at the bottom. This is very similar to how solar stills work.
This idea could be useful in desert and in winter.
comments? :)

