Check out the Cloud Controls Demos app on the Windows Phone Store here
You can find a more detailed report for the new things in the Beta in the Release Notes.
The official Q3 2013 release is coming later in October, but if you are interested in testing the Beta, you can download the trial build from here. For the license owners, the registered beta build is available under downloads section under their accounts.
We are going to award with Telerik points, every real bug report and suggestion for improvement so don't hesitate to send us your feedback via the Feedback Portal, the support ticketing system and the Beta forum.