I have to admit that as an American my chocolate flavor experience has been greatly limited to Hersey's candy bars sadly enough. Lately I have been fascinated with the idea of growing my own chocolate after having toured a bio-dome green house near by growing cocao which is definitely unique here (zone 7). I know this is a wild and impractical idea but I don't care really because this stimulates my inner curiosity for natures novelties.

Anyways, for any people interested I stumbled on some interesting summarized tidbits regarding some chocolate history. If you have access to academic databases you can get more information. A good place to start examining the wide flavor profiles is in Trinidad. Because of the decline in market value of chocolate, many of the old farming families who maintained their strains are selling off their farms or moving away from the industry. This along with other factors does put the invaluable collections of genetics at risk. Recently in the region there has been a push to revive the islands declining fine chocolate industry but this program is still early in place. If my sources are correct Trinidad is a hotbed of fine chocolates thanks to the diligent work of
Dr. F.J. Pound who in the mid 20th century collected a variety of flavor profiles from regional exploration of cocoa genetics and established gene-bank plantations. I imagine before the Spanish invasion there were all sorts of cultivars but today we are generally limited to three main groups (Criollo, Forastero, Trinitario).
I have found a very nice searchable database of Trinidadian chocolate characteristics by farm here:
http://www.trinitario-cacao.org/
A really amazing cocoa discovery of a rare plant recently found in Peru hidden near a mine in the mountains:
http://www.nytimes.com/2011/01/12/dining/12chocolate.html
University of the West Indies (Trinidad) Cocoa Research Unit - Possibly the best in the world
http://sta.uwi.edu/cru/index.asp