coffee bean are roasted seeds (two white beans in each berry) from the berries of the coffee shrub (the seeds are removed from the berries and that is what is roasted).. otherwise known as liquid amphetamine, the devils brew or simply "power" by the Arabs who obtained it from its native Ethiopia a thousand years ago. Coffee can be good for you in moderation (even science is now agreeing with this, they have even found that coffee helps to prevent alzheimers).
Chocolate comes from the cacao tree (a tropical plant), the tree grows fruit pods that contain white beans which are removed from the pod, fermented, dried and then roasted then chopped up and ground into an oily paste often called liquor, blah blah blah... Up until the late 1800s in Mexico the cocoa beans were so valued they were used as standard currency .. who says money doesn't grow on trees!?! Chocolate (the real stuff) is also very good for you, its rich in phenols that counter artery clogging plaque and lowers blood pressure, it also treats the chest pain of angina pectoris, historically it has been used to treat fevers, coughs and complaints associated with pregnancies and childbirth.. I have also heard that it can help with depression as it effects serotonin levels in the brain..
On another note if you like both chocolate and coffee here is an awesome link
http://www.equalexchange.coop/a-guide-t ... ee-pairing