Yikes! Thanks for the heads up! I just registered today.
I will jump on the bandwagon with cautionary tales about doing the Goofy. This was my 5th 1/2 marathon and first full marathon, and I felt only moderately prepared for doing 26.2 miles after doing 13.1 the day before (and the 5K the day before that). It was really stressful. In the end, it was great and I'm SO happy that I did it, but there is a reason it's called "Goofy."