Themed Weddings???

So my fiance and i are thinking about themeing out our wedding reception and making it more of an interactive PARTY than a stuffy sit down dinner with stale entertainment. Has anyone else done this? We were thinking of doing a medieval theme with the whole knights and lords and ladies. It was her idea I kindof like it and she said if we do it I can have bar wenches serving the food and drinks too! I'm really getting into the idea especially the huge feast and all the fun stuff we can add to make this a real party! I'm looking for a court jester right now! haha Anyone have any good ideas or places to find what I need?