public ITableCell GetCell(
	int rowIndex,
	int columnIndex
)

Public Function GetCell ( 
	rowIndex As Integer,
	columnIndex As Integer
) As ITableCell

var tableDef = new Telerik.Reporting.Table();

tableDef.ItemDataBound += delegate(object sender, EventArgs args)
{
    Telerik.Reporting.Processing.Table table = (Telerik.Reporting.Processing.Table)sender;

    for (int rowIndex = 0; rowIndex < table.Rows.Count; rowIndex++)
    {
        for (int columnIndex = 0; columnIndex < table.Columns.Count; columnIndex++)
        {
            Telerik.Reporting.Processing.ITableCell cell = table.GetCell(rowIndex, columnIndex);

            if (cell.RowIndex == rowIndex 
                && cell.ColumnIndex == columnIndex)
            {
                Telerik.Reporting.Processing.ReportItem item = cell.Item; 

                // Here you can do something with the report item
            }
            else
            {
                // Do nothing. This is part of a merged table cell.
            }
        }
    }
};

Private Sub TableDef_ItemDataBound1(ByVal sender As Object, ByVal e As EventArgs) Handles tableDef.ItemDataBound
    Dim table As Telerik.Reporting.Processing.Table = DirectCast(sender, Telerik.Reporting.Processing.Table)

    For rowIndex = 0 To table.Rows.Count - 1
        For columnIndex = 0 To table.Columns.Count - 1
            Dim cell = table.GetCell(rowIndex, columnIndex)

            If cell.RowIndex = rowIndex AndAlso cell.ColumnIndex = columnIndex Then
                Dim item As Telerik.Reporting.Processing.ReportItem = cell.Item
                ' Here you can do something with the report item
            Else
                ' Do nothing. This is part of a merged table cell
            End If
        Next
    Next
End Sub