well, even though i'd kind of rulled out a sub 3h marathon, I was still keeping in touch with this thread as I kept training for a more realistic 3:10-3:15. But it looks like it all over for me now, did a 20 miler at the weekend and haven't been able to walk comfortably since. So, resting at the moment but feeling negative. This was made even worse when I passed Paula Radcliffe finishing her run whilst picking my daughter up from nursery last night. But good luck to you lot, seems like some impressive and inspirational stuff on this thread, but not of much interest to me for a while I doubt - shame.
I made my own pace band since I didn't have a Garmin. But to be honest, I had no real idea of what time to expect, so I spent quite a lot of time trying to do some maths in my head! in the end I thought, sod it, I finish when I finish. I find that trying to work things out in my head takes my mind off the actual pain!
Just for the record, I had shin splints many years ago and I did feel that calf length compression socks / guards helped me. But, since I was doing other things to aid my problem, like running more off road, treadmill and reduced mileage as well as doing more exercises to help, it is hard to say if it was responsible or not. But, in my opnion, it cannot doing any harm. Maybe sometimes the placebo affect of doing something can help. I also figured that even the worse case scenario was that they were keeping my muscles warmer and that was a good thing in the winter months. I would also assume that they help reduce the muscle vibration a little, at least in my simplistic view it does! But the most important thing to know about shin splints is that the only real cure is less or no running until the problem is fixed. It's a tough one for us runners to accept.