Slacker's promised 2.0 app for iPhone won't quite keep up with the Android version in features, according to an early hands-on. The app will cache as many as 25 separate stations but, due to the absence of background downloading on the iPhone, will need listeners to start caching themselves with Slacker kept open. Android's version still has an edge as it can schedule caching to occur on its own, whether or not the app is open.
