Cocoa's real dark side is the child slavery issue. See the following link for articles:
http://en.wikipedia.org/wiki/Economics_of_cocoa
Our food Co-op researched all our chocolate sources and now only carry fairly-trade cocoa and chocolate. This affected all products, even items like cheese and beer that contain it.
Ludi is probably right about the cocoa shortage you observed being a product of high fudge making demand rather than an actual shortage of cocoa.
Still, I expect food shortages down the road. One of our largest food vendors missed
one delivery due to weather related causes earlier this week and our shelves had some empty spaces because of it.
cynthia