This has been available for beta testers via Connect for a while now and we *finally* got it posted for everyone else.

[Hyperlink Removed] The RC release has been superseded by the RTM release. Visit this post for the download location.

And for those of you who are interested in working with the WTV format we introduced last year…

Consumption of a WTV file in DirectShow
http://msdn.microsoft.com/en-us/library/cc963726.aspx

You can leave feedback here or chat about it over at http://discuss.mediacentersandbox.com.