Let it be known that I am not opposed to Vista or to upgrading to Vista, just that I think that there are a number of things to consider first. I have Vista on my new laptop, and love it! The laptop was purchased new and built around the Vista model, and I upgraded the RAM to 4 GIG's. So far for what I have been using it for (Basic Office stuff) it has been working great.
I also like some of the security features as well, such as the internet/firewall. I think it is better than the firewall that was inserted into XP. Remember good old Microsoft added it and it became part of XP release 2, but was not native at first. So with Vista I see where there are a number of security items that they (Microsoft) thought about and included into the original design instead of an after-thought. I think this does lend towards a better OS geared to run smoother and faster.
As always there are costs associated and deployment concerns to think about before upgrading or just buying new.
I am glad to see the different comments on this topic.
At this time, I think that Vista has been out long enough to get past the first major hurdle of patches especially since Microsoft has released the first Service Pack.
From what I can tell about the Service Pack, there are a number of great security and networking improvement patches included.
Happy Computing! Happy Networking!