In case you missed it over on my running blog, I completed a marathon on Sunday :). You can read about the whole amazing experience here!
If you haven't given much thought to running a marathon before, or even running in general, give it a try. It is amazing exercise, a ton of fun, and you meet wonderful people. I hated running until the end of college, and went from a fitness base of using the elliptical but no running to running a marathon in about a year. If I can do it, anyone can :).