The key to success in communication to and from sales is to understand your company’s sales culture, and what might be fun and engaging for them to be cooperative in sharing what they learn in a timely manner. Go to where sales is to get them to engage. Many sales people travel extensively, so they have time in the car or airplane to write, tape or text about what they’re learning. They also value information from their peers. Maybe you can facilitate more sharing among peers, even informally. In my experience it takes a couple of years to get sales information to flow. You have to earn their trust to build that relationship.