Magento kills this list. If you don't get why, you are not only missing some ripping cool marketing features, you simply don't get e-commerce. That said, one of my designers has been doing some pretty cool stuff with 1shoppingcart but as I just pinged him about it he says that its a bit hard to deal with style wise. Nigel
Nigel, give some examples of what makes it the best for marketing compared to others listed, such as BigCommerce.