Thank you for contacting us and for your question.
Currently RadGrid is not capable of replacing the SP ListView web part, however, the creation of such a web part control is in the road map for the next release of the RadControls suite, so, please, stand by.
Concerning your second question - binding the RadGrid control to a Sharepoint list is also an unsupported scenario. If you insist on using RadGrid for that purpose you need to take the current/default View of the SP List, traverse its fields collection for the columns that are of interest to you, build a datatable or a collection of custom objects based on those fields and the data contained within and bind the datable/collection to the grid.
I hope this information helps. If you need further assistance, do let us know.
the Telerik team
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