Hi! One of my most recent online yarn store finds is the Yarn and Fiber Company. They have free standard shipping on all orders placed on their website. I've placed two orders with them through their website, one was a magazine+pattern and the one I just got was three patterns. Really fast shipping and great customer service.
One caveat on the checkout process: I thought that my order was placed when I got an order number (step 3/4) but it isn't really placed until you confirm the confirmation number (step 4/4). So make sure to complete all four steps! The owner was super nice and I was more than slightly aghast when I figured out my silly error.
[We have fixed this issue as it confused several customers - sorry about that- ed]