Are there any free ecommerce things like oscommerce that don't require a link at the bottom of the site. Or that have a one time removal fee?
zencart or if you want to pay a little more fortune3.com is good. I think that you could find a good coder on here to remove the link !
You could try http://www.prestashop.com/ which is getting good reviews. Or try my service go2webstore if you would like brand free at a low cost and you want to be selling in minutes of setup.
If you're seeking white label shopping cart,why don't you spent some money to buy a paid shopping cart. IMO,paid shopping cart is whole lot better than open source ecommerce script. You can try this out shop-script.com
Perhaps you could be inspired by this comparison of shopping cart software i found at Wikipedia: http://en.wikipedia.org/wiki/Comparison_of_shopping_cart_software