Today, the 2nd Circuit ruled that New York City's ground-breaking law mandating that restaurants advertise the caloric content of all items on menus and menu boards is a-ok. The Restaurant Association argued the requirement violated the First Amendment rights of restaurant owners to, I guess, not tell us what they're serving.
The local government here in Nash-Vegas is considering similar legislation. Of course, inevitably, establishments will mis-represent their data. Still, seems like a good idea to me.