...
The current stable release of the Java library is the latest version available from our Nexus repository. In the very rare event that a previous stable release is designated, it will be noted here, but in most cases you can assume that all prior releases are unsupported. Support in this case is primarily about security updates, not support in a more formal sense.
E-book - A Guide to OpenSAML V3books on OpenSAML and SAML identity federation areas
Mailing List
Issue Tracking
Reporting Security Issues
Source Code Access
Security Advisories (not listed separately, refer to the appropriate product page)
...