Edward, can you share any details about features/timeline/etc.? I've got a Salesforce integration going via private app for our company. Right now it just posts completed Shopify orders as closed opportunities, with product, variant, and discount data. Also creates an Account/Contact pair to own the Opportunity if necessary. Features in development are recognition of corporate accounts by discount code, special pricing, and automatic sync of products.
It's kind of tailored to our specific product line but maybe there's some functional overlap and we could at least avoid duplication of mistakes. ;-)