The latest versions of OpenSSH for AIX are available on https://www14.software.ibm.com/webapp/iwm/web/preLogin.do?source=aixbp . The latest version of OpenSSH for AIX 5.8 has been released on 25-Oct-2011.
If you have any questions for OpenSSH development on AIX you can now send email to: firstname.lastname@example.org.
Really outdated, no fast information about openssl, versioning may not follow the developers releases. From a security driven companies perspective no good source.