I have been running in VFF Sprints for about a year and half now for virtually all my training runs, 2 road marathons, a trail 50 miler, and various shorter races. I love them and don't ever want to run in anything else. I still have some road shoes which I wear to walk around on the weekends, but for running, it's only VFFs for me.
Runners have been wearing VFFs for a while, but for the first time, Vibram has created a shoe exclusively for running, the Bikila, named after Abebe Bikila, who won the marathon at the 1960 Olympics running barefoot. On top, the look is similar to some other VFF models. The biggest noticeable difference from prior models is the padded collar, which adds some comfort, especially around the Achilles, and makes it look more like a traditional running shoe.