Via Freakonomics, Felix Salmon proposes just that!

[S]houldn’t the NYT, which can always use a bit of extra revenue, take advantage of the fact that its stories can move markets so much? Not directly: I’m not suggesting that the New York Times Company should start buying out-of-the-money put options on Mexican corporates in advance of its own stories. But how much would hedge funds pay to be able to see the NYT’s big investigative stories during the trading day prior to the appearance of the story? It’s entirely normal, and perfectly ethical, for news organizations, including Reuters, to give faster access to the best-paying customers.