I've been playing with the National Digitial Forecast Database (NDFD) provided by the National Weather Service. You can retrieve a forecast via a SOAP web service by providing your latitiude and longitude and a few other details. The web service worked fine when I called it from Python, but I was getting an error when calling it from .NET (using the generated proxy classes in VS 2003 and VS 2005). It turns out that the service needs HTTP version 1.0, not 1.1 (the default in .NET). Unfortunately,...