For all you who think Vista can play HD Video I would recommend that you read this whole article to find out what is really happening with Microsoft and Vista
http://www.cs.auckland.ac.nz/~pgut001/pubs/vista_cost.html
As far as a blue ray drive in a mini. I would say you might want to think about your Video output capabilities. None on a Mini will support blueray HD output.
Last i checked blu ray and HD DVD wernt making HDCP a requirement to watc h HD movies "yet"