Small to medium businesses I am familiar with are avoiding Vista. One I know of went to a Linux solution. Another switched to Mac.
In both cases the decision makers told me they were tired of Microsoft’s arrogant attitude and software that was buggy and bloated. They also said their users complained about the Vista learning curve and the corresponding decrease in productivity. They were particularly upset that Microsoft chose to take XP features and move them around in Vista for seemingly no good reason.
I pointed out that Linux and Mac also have learning curves. Their response was, “Yes, that’s true but we believe in the long run overall productivity will increase.” (Paraphrased.)
Mac’s take 5 seconds to boot instead of 5 min with Windows
Mac’s never have failures / error messages compared to one every 15 minutes or so with Windows.
And if you ever have to work with pictures / video / publishing web pages, then Mac’s are simply light years ahead.