The linux-cluster mailing list is super friendly, has both developers and consumers of the entire RHCS & associated packages - and CentOS friendly :) I seriously recommend anyone looking to do any sort of work with this toolchain should be on that list.
Thanks, I'll surely make a visit there. But there's not much activity...
I was looking at marc.info's linux-cluster mailing list, last post was from 2009. Maybe that was an old list... I found the linux-cluster list on redhat's site, there is much more activity there...