An OOPSLA tutorial
If you're going to OOPSLA, I recommend you attend the tutorial Programmers are from Mars, Customers are from Venus: A Practical Guide to Working with Customers on XP Projects. I haven't taken it myself (never been in the right place at the right time), but I've talked to the lead presenter, Angela Martin, at length about the topic, and she's given me the complete notes. For those who don't know of her, Angela is one of the first names that springs to mind when you think about customers / product directors / product owners. Not only does she have practical experience, but she's also done some extremely interesting anthropological-ish research. Her co-presenters are Robert Biddle and James Noble, who have quite a good reputation as presenters. (Their postmodern programming presentation a few years back is a classic, a St. Crispin's Day event.)
I mention this because the description at the OOPSLA site has two flaws. "Working with Customers on XP Projects" in the title makes it seem that it's not for Scrum projects, but it is. And the blurb does not say, "This is for you too, programmers." From Angela's description, it most emphatically is.