I'm upgrading my Ubuntu 'edgy eft' to 7.04 code named 'feisty fawn'. I've been using Ubuntu for an year and I'm getting more and more into the distro cos it's getting better and better in Computer Desktop world. Recognition of new hardware is excellent. And I love the neat Gnome Desktop. I'm enjoying my sunny Saturday with Ubuntu at home!!
If you are interested in Upgrading to 7.04, just issue the below mentioned command. No need to edit your /etc/apt/sources.list, Update manager will automatically replace the 'edgy' with 'feisty' and will comment the third party repos temporary. Issue the command as a normal user. Not the super user. It will ask for the 'sudo' password when needed. And mind, you need a broad band connection if you use the Internet as the upgrade medium. Follow the on-screen instructions. Please read the released notes too. ;-) Enjoy the Power of Ubuntu Desktop.
$ update-manager -d
P.S. You can only directly update to 7.04 from 6.10. Older version users have to upgrade the distro to 6.10 before you begin.