Hi Peter,
I managed to display additional attribute in the datagrid using following code
<%#Bring2mind.DNN.Modules.DMX.Business.EntryAttributesController.GetEntryAttributeByEntryAndKey(DataBinder.Eval(Container, "DataItem.PortalId"), DataBinder.Eval(Container, "DataItem.EntryId"), "att4", System.Threading.Thread.CurrentThread.CurrentCulture.Name).Value%>
Just let me know is there any better way to retrieve attribute value?
Sumant