Shortly after leaping through the requisite FCC hoops, Sony's 1.5GHz Xperia acro S is now on sale to able and willing Americans. For those who've forgotten, the 4.3-inch smartphone packs a 720p panel, IP55 and IP57 dust / water resistance, inbuilt NFC, Bluetooth, a 12.1-megapixel camera around back, a battery good for up to eight hours of yapping and Android 4.1