I upgraded my Ubuntu “disktop” from 7.10 to the new Ubuntu 8.04 (aka Hardy Heron) today. The entire process took around 1h30 (download of packages was rather slow) and was incredibly straightforward (as shown in upgrade docs). Everything seems to work flawlessly as far as I can tell.
Hardy is running Firefox 3 beta 5, but Ubuntu/ Canonical will provide upgrades as FF3 goes through it’s final release-stages. Strange as including a Beta might seem, this actually is a wise thing. FF3b4 and b5 have proven to be quite stable (i’ve switched from FF2 approx. 2 months ago, haven’t looked back since). Moreover, Hardy is a “Long term support”-release, with the Desktop-version receiving support until 2011 and the Server-version until 2013 and using FF3 ensures Ubuntu of continued support (read: security updates) of the Mozilla-team in the years to come.
Check out the release notes for more details about Ubuntu 8.04 LTS.