dark chocy is supposed to have something in it that's good for your heart (in moderation) - I read recently.
http://news.bbc.co.uk/1/hi/health/3185363.stm
http://www.chocolate.org/health/darkchocolate.html
"...Dark chocolate contains plant substances called polyphenols - ingredients scientists think are responsible for the heart-healthy attributes of red wine. Polyphenols also have been shown to lower blood pressure in animals..."