Including Marketing & Advertising on Balanced Teams

To date, Balanced Teams seem to have focused mainly on the product development side of the house: bridging gaps between programmers, designers & product managers and including all three as product owners. The larger divide in most companies, however, is between product development and marketing, sales and advertising. How can they be included and contribute their best talents from the start and made to feel that same sense of ownership for the overall user experience? How can they more effectively draw on the rest of the process and the team as they work? Dale will briefly describe the problem, and then moderate a brainstorming session for solutions.