CentOS - Oct 2006 - Build a shared disk, shared cpu, shared ram....supercomputing for expanding websites

Hey Group,

We are trying to build a shared disk, shared cpu, shared ram....using
a dell power edge servers.....which can utilize our server resource
for our expanding website. We are running RHEL4 on dell power edges.

Can anyone suggest any good production ready open source solution
running on top of 2.6 kernel that might work for us?

I have looked at openMosix which has only 2.4 kernel production ready
and openSSI which has only 1.2 tested on 2.4 kernel and 1.9 still in
testing.

Is there any solution which can work with 2.6 kernel. Also IF POSSIBLE
we would like to integrate the solution with Xen3.0.2.

Can anyone suggest us a good open source solutions which migh work in our case?

Thanks a lot.

Regards,
Saptarshi Naha