Diane, this weekend was great! I found both the expo and the breakfast seminar to be very helpful.
Wedding Tip #26
When finalizing your seating chart, make sure the # of people assigned to those tables equals the same # of people assigned on the place cards.
In addition, make sure you provide your caterer, banquet manager, day of coordinator, etc. with the chart and place cards in plenty of time before the wedding so they can review it with fresh eyes.