Thanks for writing.
We will put your suggestions in our TODO list and will work in direction evaluating and eventually implementing a RichTextEditor.
An extended ListView/JumpList control is definitely on our radar too - so just stay tuned.
As for Xamarin: we're put the implementation of Xamarin wrappers for our existing controls in our roadmap so extect them to be released sometime around Telerik UI for Android Q2 2014.
Let us know should you have additional questions.
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