What can we expect from this first Android device? Sadly, the HTC documentation doesn’t offer much detail. Those who claim to have seen it, however, say it will feature a trackball and a screen smaller than the one on the iPhone. They also believe it will offer access to an upcoming T-Mobile (DT) App Store similar to Apple’s (AAPL) App Store for iPhone/iPod Touch applications. The Dream will support push email, but only via Google’s Gmail service. Finally, it will use Google’s advertising platform to serve up ads based on user interests and location. Which, as far as Google is concerned, is the whole point here. “We can make more in mobile than desktop, eventually,” Google CEO Eric Schmidt said recently. “The reason is because the mobile device is more targeted. Think about it: You carry your phone with you everywhere. It knows all about you. We can use that to do a very, very targeted ad. Over time, Google will make more money from mobile advertising.”