With the future of Silverlight looking bleak, I am closely watching the development of this new UI/Framework. The Telerik Silverlight RadRichTextBox supports a lot of key features that MS Word has (i.e. Advanced formatting and tab stops).
Will tab stops be supported in the first itiration of this control? This feature is extremely important to me for a large part of my user base will be also using iPad when not in the office and since Silverlilght is not supported on iPads, I am going to have to start redesigning a lot of are site since the core of it is Silverlight.