You are using an out of date browser. It may not display this or other websites correctly. You should upgrade or use an alternative browser.
ValveTime.co.uk | Valve News, Forums, Steam
I'm sure you all remember the Visual Studio 2005 Beta 2 Experience DVD set, which was completely free of charge; and also the Indrustial Partner DVD which was also free. I found a third place on MSDN which allows you to order Windows XP Platform SDK CD's: