The Sun Cluster Agent for Informix Dynamic Server is now available for download at:
and it is supported for IDSv11. I may work with v9.4 but not officially supported. The agent is available on both SPARC and x64 platforms and supports local zones as well. More information on the open source project can be found at
http://opensolaris.org/os/project/ha-informix
You can find our other OHAC projects and general community information here.