Since 5.5 is now out from Red Hat and most likely our amazing CentOS team has already jumped on that, is there any word on Release 6? IIRC it's already a year out of date (base was supposed to be Fedora 10), so I have to wonder.
I vaguely recollect that RH mentioned pushing out the (total) life cycles of a release from 5 to 7 years, or 7 to 10 or something like that.
Their lifecycle info is here:
http://www.redhat.com/security/updates/errata/
But there's no mention of any changes on there...