Neatorama reader Paul Sprague sent his own creation: BoomChef Solar Grill, a solar-powered grill with mylar reflector panels:
It would be perfect for boomerang tournaments where you've got plenty of time for slow-cooking and where event delays usually postpone lunch until 3:30pm. Needs to be wind-resistant as these competitions always happen on the windiest days, and needs to use a router somewhere in the building of it in order to justify my earlier purchase of a router.
Link - Thanks Paul!
And of course, for you who haven't seen it: check out Neatorama's Top 10 Coolest BBQ Grills (And Then Some!)