Has anyone come up with a form for restaurant reservations that limit the number of people that can reserve for - say any given 1 hour period?

Hi,

You can actually use our "Appointment Slots" widget to do exactly that.

http://widgets.jotform.com/app/appointment_slots

This will allow you to set up different time slots and the amount of reservations that can be make for each time slot.

If you have any further questions, let us know and we will be happy to assist you further.