You’ve been heard! Out of box SiteMinder integration is here.
Computer Associate’s (CA) SiteMinder is a centralized web access management system that enables user authentication and single sign-on, policy-based authorization, identity federation, and auditing of access to Web applications and portals.
Liferay has out of box SiteMinder integration as of recent Liferay 5.1.2 release. The integration is based on CAS integration and only supports authenticating with screenName. It also knows how to properly terminate SiteMinder session. SiteMinder is usually connected to a LDAP so this integration is also able to import users from LDAP. More