Prompted by the opening of online balloting for the 2007 All Star Game a few weeks ago, we recently started wondering who might represent the Nats in San Francisco (since, you know, somebody has to). Dmitri Young? The guy’s hitting for a scorching .500 average over the last 21 games. But he’s mired behind popular stars like Albert Pujols and Nomar Garciaparra, as well as reigning MVP Ryan Howard and Prince Fielder’s 23-homer bat. Even…