I know there's been a ton of discussion about the need for more and more organized documentation around the whole project, and this question is surely something documentation would address. But having not found any, I'll ask.

I'm trying to put together a simple "shopping cart" website with the new SAAS Website Builder. But I'm running into little challenges here and there. I'd like more control over the CSS of the snippets and the "templates" if that's what we call the HTML generating files. I can't find a way to have much control over those things beyond selecting from different themes and minor changes through the menu buttons. 

But bigger than that, I'm looking for the workflow for adding products to the site. The site I'm building now has less than 50 products. So it's not totally unreasonable to add each individually.  But other companies I plan to move to this have over 2000 products to migrate. I can do some data translations to fit a new model, but I certainly don't want to have to manually edit each product page using the front end web interface.  There has to be a better way I haven't found yet.

Can you point me to docs or tutorials for migrating product data that is appropriate for the front end display of the products on the Website Builder?  I can't find any way to get at the data that is being stored when I edit a webpage.