Ubuntu Intrepd Ibex (8.10) is out. If you want to upgrade, I say wait a day or two before upgrading anything. Also, choose a mirror close to you for a normal upgrade, or go get a torrent if you’re doing a fresh install.
Here is a site on upgrading via Bittorrent (instead of just grabbing the iso) which looks interesting, though I haven’t tried it. If you’re in upstate NY, you can use the RIT Mirror.
I don’t recommend upgrading a production machine right away, as there will be some things needing fixing. Actually, if you have an inmportant server, don’t upgrade unless you really need to, as if everything works you’re probably best off not changing it.