XSEDE's Community Infrastructure area (XCI) recently published new use cases describing two important community-building features of the XSEDE system: community infrastructure and Service Provider (SP) integration. These two documents describe how the XSEDE system facilitates information sharing and coordination between XSEDE, its Service Providers (SPs), and the research community at large. Publishing the documents in the University of Illinois' IDEALS archive ensures that a public record of these relationships is available for future participants and for use in follow-on activities.