In one of her many iterations, Arianna Huffington targeted "corporate greed" as a force undermining America. That was during one of her populist phases, which frequently are followed by Huffington morphing into what she once scorned. Score another transformation for La Huff. On Sunday, AOL announced it would pay $315 million, mostly in cash, to buy the left-wing website she co-founded, Huffington Post. The merger and acquisition also will place Huffington at the helm of AOL's new Huffington Post Media Group division. AOL CEO Tim Armstrong announced that the deal will create a "digital ecosystem" -- which may be more...