Interesting. A friend of mine (an art teacher) just posted something about this on Facebook and another friend told me about it a couple weeks ago. It looks like fun and if I were a runner, I'd definitely do it!
I might even sign up for it anyway.
Edit: Bah. It's full in my area.
Aw, the one for my city is already past! I will have to do it in 2013. It looks like a ton of fun!