JoAnn's has free shipping on orders over $25 right now too!
Here is a direct link to their sale on flannels (just 3 days, I think):
http://www.joann.com/joann/catalog.jsp?CATID=cat3597
Here is their free shipping coupon code:
"Use promotion code SAD043 for free standard shipping on your order of $25 or more through Sun., 03/01/09 12:00 AM PST.*"
Happy shopping!