Please respond in the comments.
Yes - our marketing guys and our developers talk all the time, and have a deep appreciation for each other's perspectives on creating and selling products. That's not to say that they're best friends, but they have an active dialog going on.
Maybe - I think they know that the other guys exist, and I think they've been known to say hello and share brownie recipes. Occasionally.
No - our marketing folks and our developers get along like turkeys and wood chippers. In fact, I don't think I've ever seen them talk to each other. I'm not sure they even speak the same language.