The webpage mentioned onyour blog is correct in some ways (chocolate's main stimulant is theobromine, not caffeine) but wrong in many other ways (chocolate does contain minimalamounts of caffeine, mateine in caffeine is NOT a stereoisomer of caffeine as that is chemically impossible, like saying the mirror image of a chair is totally different from the original chair) so take what it says with a grain of salt.
So the main stimulant inchocolate is theobromine, but not everyone responds to it as much as caffeine. In one study only 2 out of 20people could feel any difference from fakechocolate bars made with and without theobromine. It's more likely that the stimulant effect of mostchocolate comes from the sugar inchocolate bars (~30% in good darkchocolate and up to 50%or more in milkchocolate) and the other minor psychoactive compounds inchocolate like phenylethylamine (like the street drug MDMA), serotonin, cannabinoids, dopamine precursors, tryptamine, beta-carboline alkaloids, and more. So taking the caffeine and theobromine out ofchocolate may not really reduce it's stimulating effects,though it may helppeople who are alergic to these similar alkaloids.
Given that, it may be possible to decaffeinate and detheobrominate cacao using the standard water or dimethylchlorate techniquesthough I wonder if the fact that more of the flavor compounds in cacao are water soluble vs. the more oil soluble flavors of coffee, if these techniques based on the solvent's polarity would take out more of thecacao's flavor than just the caffeine & theobromine. It would take some seriousexperimenting!
Nat Bletter, PhD