Our SL courses are all integrated into course content. For 3 years we had an active advisory board to support our Learn and Serve grant work - composed equally of faculty, students, and community partners. The board chose to go beyond advisory roles - actively worked on committees to develop criteria for partnerships, community scholar awards, etc. Faculty are informed through campus-wide events, departmental efforts, list serve notices, multiple forms of communication. We have a Center for Academic Excellence that is focused on faculty development so faculty have access to many resources to support their service learning efforts- library, consultation, seminars and workshops, etc.
Community outreach is valued equally with research and teaching.
SL bridges both teaching and outreach. I don't think that we have thought in terms of percentage. Have files of course syllabi, and courses are not identified in quarterly schedules as service learning courses. We also have a limited database of the information. We recently published a book of our partnership activities documenting two years of service learning, Capstones, and other service learning activities.