Marathon.... are you joking???

Well I said I wouldn't but I guess I will. Stephanie asked me this weekend if we could do a marathon together and I said yes. Am I nuts, probably. Will it kill me, most likely. I'm about 40 lbs overweight and have high blood pressure. I'm getting ready to run this morning as day one of a marathon training program. I've got a book from Runner's World as a guide and I'll seek out the advice of those who have run one. (or more than one.) I'll post my training on the side bar like I did for my half marathon training. Let the fun begin.