I know what you're talking about, but do you think mobile sites could possibly get away with not displaying that 'extra' information? Especially considering screen real estate on mobile devices is fairly limited.
If it is absolutely necessary, it seems like it would be fairly easy to have that show up when you select a section. That could get complicated if there are multiple paragraphs within a section (i.e. one for burgers and one for chicken sandwiches, but both of those are under "sandwiches"). You could just limit it to one description per category, though.
This is one menu that presents the type of problem I'm talking about. The line that worries me is "All entrees come with salad bar," which reflects on every entree. From my perspective, the easiest way to incorporate data like this would be to include it underneath the extended explanation of the menu item.
PS Steven - I want to set up a phone call with you or something. I'm working on something that is literally one step away from what you are. follow me on Twitter (@nate) or e-mail me at nchastain at gmail.com and let me know if you've got some time free some time next week. I'm still in the development stage and won't have a product out for at least a month.
If it is absolutely necessary, it seems like it would be fairly easy to have that show up when you select a section. That could get complicated if there are multiple paragraphs within a section (i.e. one for burgers and one for chicken sandwiches, but both of those are under "sandwiches"). You could just limit it to one description per category, though.