Thank you for your question.
Currently we do not have plans to add a DataGrid component to the suite. Having in mind the screen real estate, we decided that such a user experience is not intuitive and is not Metro-compliant. Nevertheless, if more users need such functionality, we will re-evaluate our decision.
Regarding your second question:
Hierarchical data within a mobile application is a tricky thing to visualize, especially if having more than one level of depth. You can use our RadJumpList to visualize grouped data but still, it will display it as a flat list. More advanced approach would be to use flat lists for every level. Navigation to different levels may be done by clicking an Expand/Collapse button. Editing of a record will not be in-line but in a separate view. These are just my initial thoughts - the overall approach depends very much on the application design.
I hope this information is useful. Let me know if there is anything else I might help you with.
the Telerik team
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