What do you think of Vista?
I have had Vista installed for past 1-2 months, when we were testing PA on it. It is an latest revision - 5472.
I have to say, against popular belief and articles, 5472 is pretty fast. I didnt really notice it being slower than XP.
Of course, gotta get used to it and not all software works properly on it right now, which is why I am still using XP, but I am pretty sure I will jump to Vista as soon as official version is out.