As I've stated in the past, the "Five Fingers" and the Nike Free and other similar "barefoot" style shoes are a relatively new trend that can be tolerated by some and will cause significant injuries or problems with other runners.
It all depends on your foot type, running style, training methods, and biomechanical issues. There is a lot of controversy whether some of the "motion control" shoes are CAUSING injuries and preventing the body from doing what comes natural. Additionally, runners are placing orthotics in motion control shoes adding too much control once again.
Although some patients do require orthotics, the orthotics often compete with the motion control shoes causing more problems. That's why it's imperative to have someone very knowledgeable about the running shoes you are purchasing.
Ecco just came out with a "minimalist" running shoe which I believe is called the "Bio" or something similar. It's only available at very limited stores. If you go Ecco's website, it will actually ask you several questions to see if you would benefit from these shoes.
Once again, the new barefoot technology shoes are a blessing for some, because they allow the body to function more naturally and allow the muscles to strengthen and build. In other patients, these shoes can stress the muscles/tendons and cause significant injury. You should speak with a professional that understands foot biomechanics and running prior to making a purchase.
Additionally, there is an alternative running style called the POSE method, and many of these runners also subscribe to the idea of a minimalist type of shoe.