Brokaw, Rather, Jennings and other old lions know a new age is coming, and so they're muttering a bit as they leave the stage. Who can blame them? The world in which they acquired wealth and celebrity has crumbled with startling speed. A new order has arisen. Journalism, no longer a redoubt of the illuminati, has become a vessel of grubby democracy. Anybody — literally, anybody — can play these days. They can insert their views in a weblog. They can call talk radio. Eccentric plutocrats, such as George Soros, get to spend bundles on advertisements in any and all...