Add formatting numbers back into the list - in terms of the sorting function it is the same as the currency sort, in that it simply strips all non-numeric data, but there are a number of references to this plug-in so it makes sense to put it back in.

sorting/formatted-numbers.js

@@ -0,0 +1,23 @@
+/**
+ * This plug-in will provide numeric sorting for numeric columns which have extra
+ * formatting, such as thousands seperators, currency symobols or any other 
+ * non-numeric data.
+ *  @name Formatted numbers
+ *  @anchor formatted_numbers
+ *  @author <a href="http://sprymedia.co.uk">Allan Jardine</a>
+ */
+
+jQuery.extend( jQuery.fn.dataTableExt.oSort, {
+	"formatted_numbers-pre": function ( a ) {
+		a = (a==="-") ? 0 : a.replace( /[^\d\-\.]/g, "" );
+		return parseFloat( a );
+	},
+
+	"formatted_numbers-asc": function ( a, b ) {
+		return a - b;
+	},
+
+	"formatted_numbers-desc": function ( a, b ) {
+		return b - a;
+	}
+} );