There’s a good concise summary of Hardy Heron installation and upgrade options over at Tombuntu.
I’ve been running the beta version via upgrade from Gutsy 7.10, and continually receiving updates, for the last month or so. I guess with this last round of updates I’ll officially be running Hardy Heron 8.04 LTS.
On the surface the changes between Gutsy 7.10 and Hardy 8.04 don’t appear dramatic, which is a good thing since Gutsy really didn’t need dramatic changes in my opinion, just a little spit’n'polish. Since this is an Long Term Support (LTS), Hardy Desktop users can expect security updates for the next 3 years.