Dear Tina, companies of all sizes are increasingly coming to realize that the skills and techniques amassed via managing projects represent leverageable knowledge and intellectual property of the organization. Companies are establishing Project Management Centers of Excellence (PMCoE) to faciliate the sharing and institutionalization of project management best practices in very much the same manner and approach that you are doing. The following link to the PMI ISSIG provides a very nice 45 minute archived webinar presentation.
Building Project Management Centers of Excellence: Guidelines For Development
Great post and good luck! I hope we hear and learn from others on this subject.
Mark Perry
VP of Customer Care
BOT International