Finally, this information has been posted:

http://www.iis.net/default.aspx?tabid=2&subtabid=25&i=1100

For some reason marketing has gone wild creating a bazillion version of Vista. I'm telling you right now, I am not going to answer questions like "why doesn't X work on Home" when it's not part of the feature set. Not cause I don't care that it's confusing and unncessarily complicated, just that the avalanche of questions would mean I would get nothing else done. Perhaps I should setup a 1 800number like 1800IISWhatup to answer this. Press 1 if you have Vista home, 2 for ...., Press 123 if you have Vista for Donut Manufacturing Professionas... 

-brett