PSSCOR2 has been released to the public!  I have been using this tool for years and I cannot describe what my job would be without it.  If you are using Windbg to analyze hang and crashes in managed code, then this tool is for you.  Check out Tom's post below:

http://blogs.msdn.com/tom/archive/2010/03/29/new-debugger-extension-for-net-psscor2-released.aspx