Great idea!
I'll start...
Going to be doing a handful for 5k runs in the next few months, but I am also doing the Brew to Brew run in a month.
http://brewtobrew.com/
It's a 44 mile relay run from KC to Lawrence. I have never done it but am doing it with a couple of friends who've done it in the past and said it is a blast.
Anyone else done this race?