Hello all,
Recently i created a sample web part for SharePoint for viewing the list items of a particular list and i binded the list items to SPGrid class that is available in Microsoft.Sharepoint dll......I created a textbox in the toolpart for obtaining the site url containing the collection of lists...After that step, i created a dropdown list in the toolpart which displays the collection of lists available in that particular site...Once the user selects a particular list from the dropdown control and clicks OK or APPLY, then the list items would be displayed in the Grid which i created using SPGrid.......

Now i want to implement this same concept by binding the list items to RadGrid Control instead of SPGrid.......Can anyone give me the direction of how to proceed????

I recommend you to move to ASP.NET forum http://www.daniweb.com/forums/forum18.html but I've small experience about Telerik controls so, look at: http://msdn.microsoft.com/en-us/library/ms452873.aspx then you then replace controls used in this walkthrough by telerik controls.