I own a parent content website made within wordpress, and other child websites made with html. So when the visitor wants to purchase a product, he has to leave the worpress parent website and go to one of the 20 html child websites (each one has 3-4 pages and sells one product). I also have a backend site to control the sales running in a another domain.
The job is to migrate (at this first moment) 3 child html websites to wordpress using Wooframework (http://www.woothemes.com/wooframework/) and Canvas Theme (http://www.woothemes.com/products/canvas/), to make the websites looking more professional as they are not looking good in the html version, and beside this, the html code is very "dirty", increasing the page size and also loading time.
PS: In the future I'd like to change the payment process I'm using today and install Woocommerce (http://www.woothemes.com/woocommerce/) on the parent website, and all the sales made by each of the child websites must be managed on the parent website administration panel, so I don't have to login on each one of the child websites to see and manage the sales. This way it's important to take it into account if it would be necessary to make a wordpress installation of each child website.
If the result is good, I intend to do the same with the other 17 websites.