You can use these tools to create new layers and generally experiment with S2. I'll be updating the S2 docs soon, but first there needs to be a way to take a set of layers and merge them into a "style." This is my next project.
So within a couple of days there should be a web tool in the Advanced Customization that you can use to create styles out of your layers.
But now, in the words of
brad "Less post, more code." :-) 