I had a minor stress fracture last year, not severe enough to warrant plaster though. From diagnosis in March, I began tentative running on a treadmill toward the end of June and that was on a very gradual build up (1min run, 1 min walk).
My recovery wasn't ideal in that I had a 3 week holiday in Australia in that period which involved lots of walking about which slowed down the path to full recovery. However, from the day of diagnosis, i went out and bought a bike and begun cycling the six miles to work. that seemed to keep the fitness levels quite high without much impact on recovery.
Good news was that after I got some orthotics and remodelled my running style, I've been injury-free (touch wood) ever since and have run PBs for 10km, 1/2M and marathon this year. It took lots of patience but the rewards are there.
the bat