I never thought I could work with a dark background, now I can't work with a white :)
Suggestions on a tutorial would probably be just a slight cover of scopes so people who don't know about it get the general idea, then a solid walkthrough where you begin with a template theme and use the getScope to find the scope and then just fill in colours.
So basically, I think the best thing you can do is supply a theme template and then just show users how to fill it in.
Andreas
ps I'll be using the brilliance dull beta for a while to see how it turns out ds