Often I say to customers that Change Management is a critical component of a SharePoint Enterprise deployment. One, which if missed will severely reduce the chance of success for the deployment. New material has been released which can help with your internal marketing of SharePoint, which covers some elements of Change Management. Have a look at the following resource "BuzzKit" http://sharepoint.microsoft.com/gearup/Pages/General/BuzzKit.aspx.
It includes electronic files with demo videos, brownbag presentations, posters, training certificates, and guidance on how to run an ‘internal buzz campaign’.