Fro the campers in the bunch: https://www.kickstarter.com/projects/biolite/biolite-firepit-see-fire-not-smoke/description
Thinking I might even back this for my ball tournaments... haven't yet but thinking about it.
Interesting, we carry BioLite products at work.
Seems a bit complicated for a firepit however.
We do the same thing with a battery-powered air mattress pump - just turn it on and point it at one of the holes in the firepit, so the oxygen gets underneath - boom, instant hot fire with no smoke. And when I was young, we did this with a pot lid or dinner plate, just fan the fire while building up the arm muscles. It'd be cool to be able to turn the fan down low, though.