I am going through this now, except mine was a true stress fracture.  I have been basically doing NOTHING since my bone scan on 5/24.  I had the boot but admitedly was not very good about wearing it.  I have young children and at home it was impossible with the stairs, so I pretty much only wore it at work.  From what I have read online, inactivitiy is best to ensure complete healing, with the exception of things like swimming...etc..what isn't all that clear is for how long.  I have heard 4-6 weeks, 6-8 and that it can take a full year.  I finally ran for the first time 2 days ago after passing the 6 week mark.  What I did was walk for 10 mins, run for 20, walk for 10 and the run till I got back to where I started (about another 5 minutes).  Covered only about 4 miles.  I am worried however that I may have done too much.  I felt fine then but later felt that "twinge" in my tibia.  Now it feels fine, but I am worried.  Wish I had a bone scanner at home!  Any advice would be greatly appreciated.

So, the bone scan wasn't enough to convince them you were developing a stress fracture?  On the scanner, mine looked like a flash bulb going off in a dark room.  I had run a half marathon 2 days before that, the doctor was impressed, my wife, much less so.

You would think that I would have researched this a little sooner, but I didn't.  I ran today, did 10 min walk, 10 min run ... repeat for 40 minutes covered about 4 miles.  I decided to pay attention to how my feet are hitting the ground and noticed that I am seriously hitting the outside.  I started to feel some pain in the area of my injury and concentrated on striking as flat as I could, this really helped and I was able to finish pain free.  Based on this and a review of some websites, the best being http://www.runnersworld.com/article/0,7120,s6-240-319-327-7727-0,00.html it would appear I am a classic under pronator.  The best part is that I am running in Asics Gel 1160's, a shoe designed for OVER pronators.  I have always used Asics but, I have always bought them at places like Dicks, where you get little advice and just end up buying what feels good.  Turns out that I may very well have created or at least added to my issue.  I am going to get my gait analyzed to be certain, but I am pretty sure that I now know a major contributing factor.  Another symptom that I have had and noticed since changing shoes, I now kick myself in the ankles when I run, so much so that I end up bleeding. 

Sorry for all the gory details, but I think you might want to consider having your gait analyzed.  It may be that your body is fine for running but your shoes are working against you.  Look into it now that you have so much time on your hands : ).  Good luck and I hope this helps you too!  I think you will likely find that after wearing the boot so religiously, you will be able to resume after about 6 weeks, just don't do it the wrong shoes.

When you do start back, this seems pretty helpful http://www.pfitzinger.com/labreports/stressfracture.shtml  my runs have been "loosely" based on this.

Kevin