I fixed a typo in the Wundersite var but now I am getting "Sorry, But Somebody else is already looking up their Weather." showing up and I have no idea where the %Wunder.inuse variable is being set all the time but never reset.
I do notice that the old site appears to still be available at classic.wunderground.com however changing the set %Wundersite classic.wunderground.com still results in Nothing Found... :( when one searches for a forecast.