Vista has not even been released to the consumers, and already there is a work-around to keep you from having to activate your copy. As you may recall, if you do not activate your copy of Vista within Microsoft's specified time, you will be reduced to an OS that lets you access the Internet for an hour at a time.
On December 20, 2006, KezNews posted an article on how to fool the activation clock, and therefore allowing you to run Vista without activation indefinitely. If that is not enough, KezNews has a synopsis of the eWeek article on how hackers can buy Vista exploits for $50,000.
I am not suggesting you steal or try to hack Vista; rather, I am suggesting you be careful in seriously consider before upgrading to Vista. With a completely new platform, Microsoft can claim that Vista is the most secure Windows platform ever (the same claim they made about XP), but the fact is, Microsoft has no idea how Vista will stand up to hackers -- only time will tell.