That's pretty interesting since as far as I know (I haven't ever tried it) I can basically do apt-get install virtualbox to install that (that may not be the right package name but I think they have a .deb in the tree somewhere). I'd be very happy with a nukeable windows just to try this out because god knows I'm not going to pay for that shit.
EDIT: Just got a chance to reread some of the previous pages and I really like what dooglus has been saying. I can't agree more. Windows is rooted by MS, there's no way to secure that as far as I can tell. Choice of client was obviously intentional, sealswithclubs was working on new software and they decided to start with windows. Others who say "well windows users are the majority" are missing (I think) the fact that there were cross-plaform options (shit, you could have even built a java app which would have run everywhere---java obviously has issues too) and if they had started with these, they'd have immediately been able to keep their userbase instead of losing x% of us immediately cos we don't have windows. Anyway, I guess I won't try to echo what he said anymore it's just that I think he's doing a much better job than sed (no offense dude) at getting the points across.