Hi Syed Danish,
The Cell Selection feature is still on schedule and if all goes according to plan we will be able to introduce it with Q1 SP1.
Let me go straight to the questions:
1) Can be done using custom code
2) Can be done using custom code
3) Most probably column selection will not be available in Q1 SP1 but it will added in a future version
4) Multiple row selection is already available but the ability to group selected items is not available
5) Such support is not built-in but there are many way to achieve similar functionality. This blog post reveals one possible approach.
Do not hesitate to write if you need more information.
the Telerik team
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