hi,

In 2011.2 additional styling points will be expose for every column. Currently there is no easy way to do that.

What you can do is:

this.XGrid.InitializeRow += new EventHandler<InitializeRowEventArgs>(XGrid_InitializeRow);
...
private void XGrid_InitializeRow(object sender, InitializeRowEventArgs e)
{
    FillerColumn fillerColumn = e.Row.Columns.FillerColumn;
    AddNewRow addNewRow = ((RowsManager)e.Row.Manager).AddNewRowTop;

    if (fillerColumn != null && addNewRow != null && addNewRow.Tag == null)
    {
        CellBase cell = addNewRow.Cells[fillerColumn];

        cell.Style = (Style)this.Resources["YourCellStyle"];
        addNewRow.Tag = true;
    }
}
...

HTH