top report, veggie boy- it's good to know that you can get running again, even if you think you can't even stand/ walk- hope the feet are recovering by now. I can't even contemplate what 100 miles must be like!
Blisters under toenails is a big problem for me too= I get at least 3 every time I do a marathon, so I imagine it might be a probelm during the longer races. For the marathons they are only a problem the moment I finish, and going up by a size in shoes has certainly helped.
Runspudrun- try going slower on your LSR's. it will help with building distance- plus "time in feet" is more important than distance covered.
I've done no running to speak of at more than marathon pace, but I'm managing much bigger mileages than I used to, and recovering quicker- my marathon is 6 weeks away, and I'm going to try to pick the pace up a little ( not least because I have a half in 2 weeks), but I'm more concerned with endurance than pace, I alsways run too fast in the marathon anyway, and I presume that in an ultra the effect of an early burst of pace would be pretty ghastly in the longer run ( so to speak!)