Scott Guthrie has just announed the WebSiteSpark and Web Platform installer.

You can see the video at channel9 msdn at http://channel9.msdn.com/posts/Charles/Scott-Guthrie-Introducing-WebSiteSpark-and-Web-Platform-Installer-Web-App-Gallery-RTM/

or read the blog post at http://weblogs.asp.net/scottgu/archive/2009/09/24/announcing-the-websitespark-program.aspx