Didn't Hyperion claim to have the DE totally integrated into the OS by OS5. A long way away I know.
I believe that was the official timeline laid about by Amiga Inc. I don't recall Hyperion making any real announcements about OS5.
As far as I'm concerned, the extreme neglegence of their legal documentation on their developer website tells me they haven't kept anything up to date.
I'm curious as to what Amiga will say when they update their website. It had better not be some "Planet Zed II" announcement or some crap.