Indeed. Bad Vista is a perfectly legitimate campaigning group. But, that is what they are, a campaigning group just like any other group peddling an opinion.
Having read their views, which to my mind lose some weight by relying on sensationalism, (eg your quoted section) I am more inclined to disregard them. I happen to think MS are entitled to do whatever is reasonable to protect their commercial interests. I do not feel threatened.
From what I can see Vista will do things for me that I am looking for and I do not regard the £150 for the Home Premium upgrade as expensive given the investment MS have put into it. Timing of an upgrade will be important but for many buying a new PC it will just happen just like it did for XP.
Your cautionary post is thoughtful and posing a few questions which everyone should think about. What I find amazing is how many zealots there are who simply want to bash MS and consider it their duty to make sure others do not use something they themselves do not want or use anyway. (or maybe they do!) Information is one thing the other is just plain mean mindedness.