I've been running my whole life...but I've never considered myself a runner, per say. Got prescription orthodics when I was twelve, and struggled with on and off knee and hip pains for many years. My best 5k was about 19 minutes, pretty good, but not great.
I missed running, and after all this commotion about barefoot running and barefoot running technique, I decided to try it. I used my old racing flats, which are essentially a foot sock, and emulated the technique in various videos linked to in the primal community.
After the first day and four miles I was amazed how great I felt despite not having run in over a year. Other than slightly sore calves, no knee pain, no hip pain, no nothing! Yesterday I felt like a kangaroo just galloping along on my toes. I felt so good I decided to sprint up a hill five times that was on the way.
My only regret is not doing this sooner...