I highly recommend Green & Black's Maya Gold Chocolate (Dark chocolate flavored with orange, cinnamon, nutmeg, and vanilla).  It's organic, fair-trade, and very delicious.  The cacao is grown by Mayan farmers in some of the poorest regions of Belize.  Fair-trade has provided these growers with a viable source of income.  Many are able to pay for their children's education or afford health care for their families.