Bear with me...I just kinda thinking out loud.
Seems that the Beaner might not be all that. Both the zip stove and wood-gas stove require a battery. Both the zip and wood-gas stoves are heavier than most other stoves (weight is saved in not needing to carry fuel). The bulk of this extra weight seems to come from two things...the electric motor and and battery to power said motor.
Here is my thoughts
1. Add holes in the correct location so that on a windy day the stove doesn't need a fan but is powered by the wind.
2. Replace the motor with one of those things that power windup toys and add a small crank. That way on non-windy days you can power the fan with minimal cranking (in between stirring food and adding more fuel)
I am not mechanically inclined to make any of this works...but if you can you might have the next cottage industry on whiteblaze. (If you make millions don't forget to say thanks and send me a nice x-mas gift.)