Source: EngadgetAs you might have heard a little while back, Windows Phone 7 is the latest smartphone OS to have joined the SlingPlayer gang, meaning WP7 fanatics like Ballmer can be couch potatoes wherever they are. Well, assuming they have data connectivity -- be it 3G or WiFi -- and some battery juice on their phones. For better or for worse, the latest SlingPlayer Mobile app is very much like its other flavors -- same easy preparation, a familiar interface, and a similarly tear-inducing $30 price tag. There is, however, one nice addition: a new "Zoom" button on the menu page, which actually chops away a good portion of the black border around the picture. Another noteworthy difference is the more stylish interface in comparison to the Android and iOS versions, but of course, some might think otherwise.