I'm handling the UltraWebGridExcelExporter's OnInitializeColumn event in order to provide format currency properly in Excel.  Here's an example of the method I typically use:

protected void uwgExcelExporter_InitializeColumn(object sender, InitializeColumnEventArgs e)
{
   switch (e.Column.Key)
   {
      case "Target":
      case "Adjustment":
      case "AdjustedTarget":
      case "Difference":
         e.ExcelFormatString = EXCEL_FORMAT_CURRENCY;
         break;
      case "PercentageDifference":
         e.ExcelFormatString = EXCEL_FORMAT_PERCENTAGE;
         break;
   }
}

When the column contains a WebCurrencyEdit control, this doesn't work properly and the numbers are exported to Excel as text.  Does anyone know how to get around this?