I'm not running this, but a buddy of mine is. It's typically a relay where 12 runners combine to run the full distance. My friend, Jon Burg, and 3 other friends of his are actually all running it solo. They're going to run together through the first 108 miles, and then might split up, depending on how they feel.
Here's Jon's gear laid out for the run. Wowza.
Good luck, Jon, and to your 3 friends. I'll be following online. For the record, you guys scare me, and inspire me, both at the same time.