The primary goal initially is just to allow people to seriously alter some provided templates or to create their own, so I had not planned on having a marketplace/library (although hopefully this would come out of it). I have a lot of respect for what people have done with the Shopify templates, but I am cautious about rolling our own on the basis that it requires someone to learn it. I was looking for something that might be more widely adopted and used by a few apps (Mustache mentioned in here looks interesting and I'll check it out).

In terms of customiztion with colours, logo etc - we have this already based on CSS. People can pick different colors through a color picker etc and that works well, but I want to two-tier it (as you have suggested) and allow power-users the flexibility to create their own

Thanks for the reply though. Really appreciate it