Have you checked out CrossFit Endurance?? I'm not sure if someone has mentioned this already.
After many years of trying to convince my wife to the contrary we are running our first marathon later this year. She's been wanting to run one since before I met her.
I plan on utilizing the CF Endurance WOD's in lieu of a traditional marathon training program. The wife isn't too convinced and will be using a traditional approach. We'll see how long it takes her to scrap that and switch over.