Windows Phone Controls are not working inside the browser, so we can't technicaly create such a demo.
You can install our demo application from the marketplace on your phone
and to get the same experience. The other option you have is to download the demo application from your account and to examine it on the windows phone emulator inside VisualStudio.
the Telerik team
Register for the Q2 2011 What's New Webinar Week. Mark your calendar for the week starting July 18th and book your seat for a walk through of all the exciting stuff we will ship with the new release!