Just upgraded to Hoary Preview via CD...

[Senectus .]

All I did is :
sudo apt-cdrom add
sudo apt-get dist-upgrade
and answered the yes/no questions.. nice and easy..
Some odd things happened though..
It appears to have uninstalled GDM and Gnome and given me KDE

I had forgotten how much I really missed KDE.. and now I think I might
stay with it for a while..
Gotta say though guys.. nice work.. it feels faster and snappier and
looks nice and clean.. and I'm pretty sure my glxgears scores went up
by about 200-400 points :-)
-- 
Ubuntu Warty 4.10 (desktop)
and Hoary 5.04 (Laptop) (kernel 2.6.10-25 686)