Mate, dont discount the LED or electronic ideas the guys have mentioned too early, cause alot of places have larges 42 inch plasma TV set ups on the wall for a menu (very cheap to buy now), with a cheap computer running programming with pictures of specials n various menu/foods stuff on the screen, split into quarters on the page with pictures n pricing etc, and even a small few 18 or 20 inch monitors on the counters also displaying all the info..its very cheap to set up and very modrn looking...and as they say  APICTURE TELLS A THOUSAND WORDS, of a juicy hamburger with chips n drink next to it for $9.90 etc...u know what i mean...

investigate all ideas, keep the std menu on the wall if ya want, but it doesnt mean u cant add some other ideas as well...food for thought ! (oh the comedy just keeps coming)....