First of all - I love this site! My hubby says I am slightly obsessed :)
Here is my suggestion - have an option to make our food journals public. That way if someone posts on the message board that they are having problems losing any weight or they need help adding fiber to their diet others can look at what the person is currently eating to help analze the problem.
This would probably have to be optional - I am sure not everyone would like to have what they eat public.