CentOS 5, RHEL 5.6, and security updates

I actually haven't tried SL's 5.6 "alpha", so I don't know how far along it is (I have been using their 6.0 rolling release for a few weeks now without problems). They do seem to make their dog food available immediately for the masses to consume whereas CentOS uses a more private QA process (no public release until final).

Note -- I don't mean any of this as a slight to the CentOS crew. I agree with you -- if you need quicker turnaround on any of this, you should be paying RH money.