SAP Design Guild -- "The SAP Design Guild is a stage for UI people: Here they can exchange information and opinions on visual and user interface design issues. In addition, SAP offers its design resources here, be it style guides, methods, or insights on how a user-centered development process should be carried out and how the mind change within a company towards user-friendly software can be faciliated." (Comments: MadMan pointed me to this page: Overview of the SAP Design Guild Resources.)