We are about to release an initial internal test release of CentOS 5 beta 
to our qa team.

If folks here want to be a part of that test they need to join the 
centos-qa list (http://lists.centos.org/mailman/listinfo/centos-qa) and 
send a message to this list (centos-devel) saying that 
they would like to be a part of the qa process and join the qa team, 
with details of relevant experience if you are not known to the core 
developers.

Membership of the centos-qa list will then be approved.