Excellent, I have just migrated my home rhel ws 3 to CentOS. My home personal server running all my private mambo, shoutcast server,photos server and few samba public folders has just been migrated. It was not up to date since a long time since I did not renew the subscription.
To migrate, I simply followed the instructions in the "How do I migrate from WBEL-3 to CentOS" and it was ok for me.
My server has no screen connected and I usually only telnet it but sometimes I use vnc; VNCserver is running fine, I can see the CentOS start logo :-D
Thanks to the team
Guy , Paris - France