Newegg's offering 10% off any Corsair XMS memory purchase today only - Promo Code BFCORSXMS
Not sure if this deal includes Dominator sticks, but the page they link from the promo has them in the list. They all look like they have free shipping too.
2x2GB of DDR3-1333: $58.49-62.99
2x2GB of DDR3-1600: $67.49-80.99
3x2GB of DDR3-1333: $98.99-108.99
3x2GB of DDR3-1600: $112.49-130.49
(price range depends on memory timings)