As you may have already heard, many are expecting the beta 2 release of iOS 7 to arrive today or later this week. In the past, iOS 6 beta version were offered over the air to beta software developments allowing for direct download and update to your iPhone.
To check for an update, simply launch Settings > General > Software Update
Tap download and install if/when the beta 2 version is available.
Apple mentioned that the iPad version of iOS 7 would be available in a few weeks, leading many including myself to believe that iPad support will be included in this update.