Xen Community:
Josh West from Brandeis University is doing some amazing things with open source Xen and is actively supporting the community on IRC, a Xen Management Project, and documentation for the Xen API. He has presented the Brandeis Xen implementation at Higher Education Users Group Alliance 2008 event in Las Vegas and helped create the Xen.org Case Study at http://wiki.xensource.com/xenwiki/Xen_Case_Studies?action=AttachFile&do=get&target=Xen+Brandeis+Case+Study.pdf.
His profile is at http://www.xen.org/community/spotlight/jwest.html along with his social networking links. Feel free to connect with Josh and learn more about his PeopleSoft implmentation on open source Xen.