Hi Thomas Andersson,
1. We have an example which replaces the EditAppointmentDialog with a custom one. Please take a look at the QSF, RadScheduler's DataBinding demo's source code. In the demo, the scheduler uses a CustomEditAppointmentDialog which extends the default one by adding an e-mail edit field.
2. Please, take a look at the following help article which describes how to customize the edit dialog:
3. Yes, we are currently working on the new version of the control. One of the major features which will be included in the scheduler control is a TimelineView. We will also publish on the web site our roadmap very soon and you will be able to get more detailed information about the new features which you should expect in the Q1 release..
If you have more questions, please feel free to contact us.
the Telerik team