Theme Builder

I would like to see a Theme Builder as an add-on so that themes could be rapidly built visually.
There is a lack of stock Vaadin themes to select from and it is time consuming to try an alter the existing ones when all I want to do is produce my application.

Is anyone working on one or can this be a spark that gets one developed?

I am sure I am not alone in wanting more themes and/or a Theme Builder.