I spoke to a friend earlier today about a wedding she went to last weekend and she said that it was nice but it seemed like the band leader and catering manager didn't coordinate their schedules.
She said that the band would announce that it was time for a course to be served so everyone sat down and the food didn't come out for 20 minutes and by the time everyone finished eating the band took a break.
It's very important that you make sure that your vendors all know what the timeline for the wedding is. The photographer and videographer need to know when you're getting ready and planning on taking portraits as well as the ceremony start time and outline for the reception. Your caterer, location manager and band leader or DJ should coordinate the timeline for the reception -- when each course will be served, when special dances and toasts will take place and when you plan on cutting the cake, tossing the bouquet and garter and any other special moments you have planned.
Your vendors will probably have a form that they will complete with you so that nothing is left off the list, but don't be afraid to ask them to coordinate times with each other. And if you have a wedding planner - for your entire engagement or just day-of - she'll be able to create a timeline for you.
And just to let you know, I created a wedding day timeline with The Wedding Organizer so if you pick up the planner at russellandhazel.com you can use that as a guide.