What someone needs to make is a kief catcher for a cheapo coffee grinder!
Stoner idea # 205
I tried using one of those countertop coffee grinders, and one of the "spin-top" ones with the push-button on the cup. They both rip the hell out of weed, but don't do it efficiently. The counter models grind between two wheels, and adjusting the "grind" just adjusts the distance between the squishy-wheels. Gums up in a heartbeat unless you have some bone dry weed.
The ones with the open blades spinning on top just cut it randomly. You end up with big chunks and dust.
Stoner idea #206 - Come up with a good large capacity electric weed grinder that operated on the same principle as the hand grinders. A SLOW spinning opposing blade set-up line a hand-twister, but funneling out the bottom into a catch chamber (like on the coffee grinders). A removable keif separator could be incorporated in the catch tray.
The trick would be to have the right blade and sieve/hole combination that lets it fall through prior to it being ground/gummed/clogged or whatever.