This time it's really late for Red Hat. It's is going to defy its traditional release cycle pushing RHEL6 further back. People are just throwing guesses as to when the next Red Hat, i.e., Red Hat Enterprise Linux Version 6 will come out.
There was a big buzz when Fedora 9 was released, that buzz moved across many Linux blogs and forums when Fedora 10 released. Alas! Now Fedora 12 is about to show up in 2 or 3 days. Still there has been no news of RHEL6's whereabouts - no betas, no feature lists, nothing!
Historically, Red Hat Releases do not seem to follow any schedule. But the releases get delayed over the years as the news releases come in. Let's have a look at the durations between major Red releases.
RHEL 3 -> RHEL 4: 16 months
RHEL 4 -> RHEL 5: 25 months
RHEL 5 -> RHEL 6: ? - 36 months (as of 14th March, 2010) and counting
Add your own guesses on RHEL6's features, put your own release speculations - it seems it will be released when it's ready.
Let me put my first guess: RHEL 6 will be based on Fedora 15, it'll have ext5, xorg 7.9 kernel 2.7.30.. Just joking. Plz post your speculations about RHEL's next big release in this blog based on facts.