There was an article a couple of days ago here on Information Week about open sourcing Sun Java Enterprise System is , with quotes from our COO, Jonathan

But little is said about the on-going effort to make soon to be open-sourced Red Hat Directory Server (formely know as Netscape Directory Server) and Sun Java System Directory Server 
converge to a single open source code base to provide the best, most
performant and scalable directory service, with complete
interoperability on all OSes: the iGalaxy Directory Server.