With the coming of Windows Vista, I've got plenty of work to do! I'm soon going to purchase a fully new desktop setup complete with Vista Ultimate and DirectX 10, thanks to the support of DirectXTutorial's generous donors.
There are plenty of other innovations going on also. I'm also planning to update the DirectX 9 tutorials from the February 2006 release to the latest version available.
In the meantime, do study the DirectX 9 tutorials currently available. Having knowledge of DirectX in advance will make your journey into DirectX 10 much easier.