I have currently been assisting an AIX colleague to use IPA as authentication/authz provider for AIX systems.
That way we are moving to a common platform 

We have found some examples on the web (AIX 5.x, AIX 6); information here and there - but for the moment we still have a few issues.
The proprietary AIX schema extensions would be a nice to have, but are not required (as I have read in earlier posts)

Has anyone seen a complete working example for a AIX client configuration for FreeIPA?
Once we have found everything; I'll try to share the information.

-- PieterB