Hi Martin - In my experience numeric attributes are automatically right justified in a datagrid column. I certainly have attributes of type 'Currency' which are displayed right-justified in datagrid columns by default. What are the datatypes of the attributes you are displaying?
In a dataview you can add the following style, 'text-align: right;' in the Style property of a text box, but I don't think this property is available in a datagrid column.