QUOTE(sisu @ Jun 20 2007, 02:19 PM)

I've had to switch my Tuesday run day with my Wed. rest day the last couple of weeks. Seems to have worked fine, except for this week when we had an extra day off (why was that?) Now I have had 3 days off in a row. I will run the 40 minutes tonight, and the required minutes tomorrow. Is this ok to do every now and again? I haven't had 3 days off since I started in March and it felt weird.

Is there a method to the run days/rest days schedule during the week?
Other than injury or a mental break, there's no reason for a 3-day break at this point in the schedule. A 2-day break is plenty.
If you need to juggle days around, I'd suggest to keep this in mind: most marathon programs, including the USA FIT schedule, are really designed with a 2-week training cycle in mind. That's because the "ideal" training cycle, physiologically speaking, would be something like 11-12 days, not 7 days -- since the world revolves around the 7-day week, though, a 11-day cycle would be thoroughly confusing, so we pad out the schedule to 14 days, then fit that into our schedule. As noted in the PFit/VFit newsletter that John just sent out, our weekend runs alternate between shorter and longer runs: now you know why!
So you actually can move things around within those 2-week cycles with some flexibility. I wouldn't stress about having your long runs on Sunday and Friday because one of them is bound to be long (11-13 miles) and one shorter (8-10 miles). Just make sure to get two rest days betwen the two and you'll be fine.
Since we have a standard training program we can't optimize for everyone's calendar. Try to avoid having two hard days in a row (though some people manage even that fine), keep the right number of rest days, and you'll be fine.