Chris and he thought it was a swell idea too.
Here's what I am thinking initially.
1) All kinds of cargo bikes welcome. Xtracycles, Utes, Madsens, Big Dummies, Mundos, Bakfiets, whatever you've got.
2) You'll have to carry some stuff. Probably even load and unload your bike.
3) Most likely a lap race so lookers-on can have a central place to hang out.
4) Somewhere in Denver, central-ishly located.
So, if anybody out there has a cargo bike or has a friend that has a cargo bike, and you feel like hanging out with the owners of some other cargo bikes this summer, let me know.