I cook my breakfast from several raw ingredients (about 12) and was trying to come up with caloric and nutritional content for the same, for few ingredients I could get details on Wikipedia, a bit of google brings few other sites, though I am wondering is there a comprehensive listing of most known edible items, what is the best site for that?
you might want to give the recipe analyzer over at calorie counter a try.
Input ingredients and quantities and it will calculate nutritional info. It is a bit rough around the edges and you will probably have to tweak it, but it's a start. :)