Is Pluto an Enterprise Portal?
No, the Pluto project aims to provide a Java Specification compliant Portlet Container. In order to support the container, the Pluto project provides a simple portal, however, this does not provides optional services such as single sign on. If you are looking for an Open Source enterprise Portal implementation, there are several available. Apache Jetspeed is an enterprise portal hosted by the Apache Software Foundation. Sakai and uPortal are both educational portals which utilize Pluto as their container. There are many other open source portals.