CentOS 6.0 has been released: http://wiki.centos.org/Manuals/ReleaseNotes/CentOS6.0
Since Plesk 10.3.0 supports RHEL 6, it should also work on CentOS 6, so I expect official support for Plesk 10.x on CentOS 6.x will arrive soon.
Since Plesk 10.3.0 supports RHEL 6, it should also work on CentOS 6, so I expect official support for Plesk 10.x on CentOS 6.x will arrive soon.