Monterey / AIX 5L

IBM has announced "AIX5L". It's essentialy AIX Version 5. The 'L' stands
for "Linux Affinity". A statement that AIX is going to support some of the
Linux API's and interfaces (for instance: the /proc filesystem)

Some changes to the filesystem limits, virtual IP's, dynamic dealocation
of swapspaces.

You can read all about it in http://www.ibm.com/servers/aix