>Does anyone know the correct syntax to place a default date value (System.DateTime.Today) in a typed dataset's DefaultValue property??<

I think it's something that belongs in the DataSet itself, so I would advocate hooking into the ColumnChanged or RowChanged event handler in your Typed DataSet. I've used RowChanged events in my sub-classed Typed DataSets for things other than defaults (haven't used the ColumnChanged event, but I imagine it might be similar).

~~Bonnie