I guess I missed it, but at some point in the past few months OPML Workstation relaunched or rebranded itself IntelligentTeams. Maybe it was a soft launch? I don't know. Maybe I'm just not as tuned in anymore.
IntelligentTeams looks like a LAMP-based OPML Community Server (but I have no idea what the underlying technology is). It's pretty rough around the edges -- a lot of new windows opening, jarring full page refreshes, links to external site to provide certain functionality -- but it's workable. Check out this page from John Palfrey.