Sun recently released its "Social Software for GlassFish". It is now available @ GlassFish update center for both AppServer 9.1 & AppServer 9.1 UR1.
The download contains an integration of both roller (blogging) and slynkr (content rating) social applications, along with a common administrative interface, common user management, dynamic discovery along with single sign-on (including support for Sun's Access Manager).