Technically not an ergo board, but in it's current setup I'm using it as a one handed gamepad. That makes it ergo, right?
After a year off from gaming, I've been itching to play. While designing some sort of gamepad, I realized I had basically already designed what I was wanting - Chaz.
After tossing ZMK and an adjusted keymap on it, I think it'll work well enough while I think about what I really want in a gamepad. If, for some godawful reason, you want one of these - I've got a few kits up on my site or if you think you want five of this abomination, it's Open Source.
This is like the mega bloks of keyboards