The Dell Aero may be the second Android smartphone to reach AT&T. It looks like Dell rebranded the Mini 3 and called it the Aero for AT&T.
2010 should be a very interesting year as we see more Android smartphones emerge on the market. We're also going to see a few new BlackBerry models and Windows Phone 7 Series should come out by the end of the year. Meanwhile, the Apple iPhone 3GS will probably remain unchanged.