That information, if it's there at all, is usually buried in some awful Flash animation.

And I want the PRICES to be in that menu. Drives me nuts when there are generic menus with no clue of prices.

See, that's where it gets hard. Menus, and especially prices, change. People get upset if they're charged differently to what they saw on the website, and keeping the two in sync requires a conscious effort on behalf of the restaurant that it's not likely going to receive.

There's two way around this problem (keeping the website up to date) that I can see: integrate with existing POS system (expensive and hard) or offer a service to update the site for them.

There's an idea for someone - buy yourself a fax machine (yes, really), and offer a service whereby clients fax you a copy of their menu when it changes and you update their website.