Fabric Loft (U.K.): Free shipping on orders £45+. (through 8/31/10)
KimoYES (Australia): Huge sale section has 20+ pages full of gorgeous vintage Japanese silk and cotton remnants, including the silk crepe butterflies above. (while supplies last)
Mad About Patchwork (Canada): Lots of fabrics at 30-50% off in the summer clearance sale. (through 8/31/10)
Pink Panda Fabrics (Canada): End of summer clearance sale. (while supplies last) Always free shipping in Canada, no minimum required; free shipping to USA on orders $99+.
Simply Solids (U.K.): Free postage on all orders over £15. (end date unknown)