Somewhere, it would be really helpful to make it clear which themes are customisable and which aren't. I spent quite a lot of time today wondering if custom CSS was only a paid account feature because I'd clicked on Zesty White and couldn't seem to do anything. I couldn't find anything helpful on the wiki or in the FAQ's. I know it's all new and not yet in place and that's fine, but at some point, that's information that would be really useful for people to have.