I guess this is a kind of Shopify with affiliates' data. I think you're going to have to do a lot more with the designs, by which I mean you need a lot of good

I guess this is a kind of Shopify with affiliates' data. I think you're going to have to do a lot more with the designs, by which I mean you need a lot of good templates. You could try to encourage designers to submit designs, you might have to curate them yourselves for quality, but some form of template structure would be required. It's going to be some "off topic" work to set that up, and you'll have to somehow provide an incentive for the designers to do something though. Polyvore springs to mind, because actually it gives college fashion students a great way to experiment with colours, layout and design, I'm sure there's a complex engine behind that though. (Those guys are ex-Yahoo.) The point being, that students can be a great source of content, if you give them the right tools/incentive