The Windows SDK for Windows 7 is available for download!

http://www.microsoft.com/downloads/details.aspx?FamilyID=a91dc12a-fc94-4027-b67e-46bab7c5226c&DisplayLang=en

Updated documentation for Media Foundation is also live on MSDN:

http://msdn.microsoft.com/en-us/library/ms694197(VS.85).aspx

You can read about what's new for Media Foundation here:

http://msdn.microsoft.com/en-us/library/bb970511(VS.85).aspx

Please remember that everything new in the SDK is beta and subject to change. Over the next few weeks, I will be posting more about the new features.

 - Mike