Use Ubuntu. It will be worth it in the long run if you're just playing WoW, don't expect wine to play crysis great; because it won't.
Sudo means 'super-user do', which as shirik said, lets you run commands as root.
Also, Ubuntu installs a ton of extra stuff (like compiz fusion) by default now. That makes it a lit'le bloated. You can remove what you don't want though after installation.
There is also a slight learning curve, but it's not so bad (at least it wasn't with me).
And wine comes with a clone of windows notepad
If you choose Ubuntu, just post here or im me (see profile) and I or some of the other GNU/Linux users here will help out.
