[CentOS] Centos 5.2 ,5.3 and GFS2

Fri Mar 20 17:13:07 UTC 2009
FM <dist-list at LEXUM.UMontreal.CA>

I will create a Xen cluster and using GFS2 (with conga, ...) to create  
a new Xen cluster.
I know that GFS2 is prod ready since RHEL 5.3.

Do you know whent Centos 5.3 will be ready ?
Can I install my GFS2 FS with centos 5.2 and then "simply" upgrade to 
5.3 without reinstallation ?