This is a really good article on one man's switch to Linux. Instead of focusing on the actual migration, however (as many of these types of articles do), this one focuses on the reasons why he made the switch. It's a short and entertaining read, but he brings up several important points. My personal favorite quote?
It wasn't just the virus, or the thrice-weekly crashes, or the forced upgrades or even the massive, bloated resource hog that Microsoft Office has become. It was the realization that Microsoft is building the Great Eye That Never Sleeps, which, in combination with your government identification number, will be used to track you, verify you and determine if you are a properly obedient little wage-serf.
Here's the full article.