You don't really need to set up a root account.
You can just throw a 'sudo' in front of a command. When it asks you for a password, just use your regular password.
Also, in hoary, you can select
Applications/System Tools/Root Terminal, tpye in your password and have a root terminal until you close it.
Of course, I guess there may be other considerations for actually setting up a root account and using su and su -. But I haven't needed it yet on my home system.