Samba cluster support codebase

[Abhijith Das]

Hi List,
I was told (in a discussion on the samba mailing list: 
http://lists.samba.org/archive/samba/2006-March/119252.html ) that 
clustering support for Samba3 is being developed and some code/patches 
exist. I was hoping to get my hands on this code to play around with 
some cluster-specific aspects of Samba. Can somebody point me to the 
right code/patches/CVS-tree where this cluster-specific code is being 
worked upon?
Also, documentation regarding what works and what needs to be 
implemented would be very helpful.
Thank you,
--Abhi