This is quite easily the most active topic of discussion we have going right now, internally, customers, MVP’s, Master’s, Moms and Dads, it seems everyone wants to know.
The problem is that the answer is simple despite each group trying to tweak the discussion to the nuance of their deployment need or desire. Want to know the answer? It isn’t hidden, but publicly stated here - http://www.microsoft.com/windowsserver2008/en/us/supported-applications.aspx
You are more than welcome to contact me via the blog but I guarantee you we have heard the question before and the answer is still in that link above.
Putting aside the humor, the good news about issues like this is that we are working through testing of a full deployment, not just 1 or 2 roles or scenarios but a full test matrix and that is complex and takes time especially if you run into an issue that you need to investigate and maybe even wait for a fix.
Three cheers to the Sustained Engineering team for persisting through the work and the continued questions.