This list is probably the extensive I've seen on the Internet with some scientific accuracy behind it. A more condensed list with great references at the bottom can also be found here.
The numbers seem to jive with my own experience, especially in the high variance of some of the foods.
As some of the commentators alluded to, if you are looking for specific pH values of dishes rather than ingredients you'll probably want to use some pH strips to figure it out.
Also, if you are looking for more pH numbers on the internet, stay away from sites related to the "alkaline diet" as they seem to use some other system to determine alkalinity which doesn't appear to be related to pH. I found several sites that refer to lemons as "alkaline" which seems to be as far from the truth as I could imagine.