We’ve placed the copy for WPD in the webplatform GitHub repository  (You can see a TOC view of the content in the js_toc.html file in that depot). The pages are the well-formed, HTML files that we use to create the documentation on MSDN . As such, we in the WPD community still need to convert the source to MediaWiki format for publication. This is the same requirement as when Microsoft donated the 2,000 or so HTML and WebApps reference pages as part of our initial funding for Webplatform.org. Doug, the other stewards, therest of the community, and I will determine the best way to merge this contentinto WPD in as expedient as way as possible.
Getting these pages in the hands of our community took the work of a host of individuals, and among the many I should recognize I would especially like to cite Kathy Shoesmith (Microsoft) and her wonderful team for preparing and delivering the content; Doug Schepers (W3C) for helping negotiations move to fruition; and Wendy Seltzer (W3C), Geoffrey Creighton (Microsoft), and Tyler Fuller (Microsoft) for ensuring all legal obligations were met.
I look forward to seeing these up on the site soon.
Microsoft's (and my) involvement in the Web Platform Docs project dates back to its inception almost two years ago. Ten supporting steward organization (the W3C, Adobe, Facebook, Google, HP, Intel, Microsoft, Mozilla, Nokia, and Opera) have pooled our resources in order to create a single, centralized, nonpartisan, accurate, complete, and comprehensive collection of educational and reference materials for web development. But it's more than that. WPD is a community effort. Anyone can join or contribute. The infrastructure is set up using an instance of MediaWiki, the same as Wikipedia. You can visit the site at www.webplatform.org and watch an overview video. From there, check out the docs (http://docs.webplatform.org/wiki/Main_Page) or the community content (http://docs.webplatform.org/wiki/WPD:Community). Better yet, join the effort and start editing, writing, and contributing in other ways. You can add a little code sample, write a tutorial, or join in for some of the organized doc sprints or other activities.(http://docs.webplatform.org/wiki/WPD:Community/Community_Events)