Yes, I actually did. Specifically, the dream was of a 24-hour relay around a high-school track that I ran with my brother S__. In the dream I was thinking how I would describe the event in a runningprofs post.
Having awoken, I'm now interested in putting on such an event. Maybe it sounds deadly boring, but you could throw a huge party in the infield, bring on sequential musical acts, each team could have its tent/pavilion at a certain spot around the perimeter, and you could contribute all proceeds to a worthy charity. If you allowed large enough teams, participants could even spend a normal day before showing up for their shift in the evening. Dean Karnazes would certainly show up to speak. This would be much easier to organize, and to participate in, than a RAGNAR event.
Further thought: this could be like a dance-off. Maybe somebody will donate a cool car, and the longest time continuously running wins the car.