Straight to your questions.
1. There are no major or breaking changes between beta and release version.
2. For now, RadOrgChart
does not support PDF export. That suggestion is in our ToDo list, so we will consider it for future releases.
the Telerik team
If you want to get updates on new releases, tips and tricks and sneak peeks at our product labs directly from the developers working on the RadControls for ASP.NET AJAX, subscribe to their blog feed