Red Hat Enterprise Linux 4 and 5 get another year of TLC (The Register)

Not as simple as that.  During the "full-support" period, updates can include "feature
enhancements" -- so it should not be assumed that RH will be standing still while waiting for
RHEL 6.  

But also, keep in mind, that in the enterprise space longer upgrade cycles are often seen as a
good thing, not a bad thing.

I think this will be well-recieved.  RHEL 5 still feels "fresh" and is a quite capable Server
OS.  It's only in the desktop / workstation space that it might be starting to get a little
stale.  But people who are determined to stay on the cutting edge aren't the ones who are
likely to buy from Red Hat. 

In the enterprise space, I expect purchasers to look for a matching response from Novell and
others -- so in a sense they will be expected to "keep up" with Red Hat's "slow down".