It's here!
Orthogonal keys are weird, but not that hard to adapt to. The biggest shift is going from top row to bottom, I'm sometimes a full key off. I remapped it slightly to remove two switches and get a 3-key wide space, but otherwise stock. There are two extra modifier keys to get at top row numbers, symbols, and f-keys. I expect I'll be at full speed within the week, which is surprising. This is no where near as bad as trying Dvorak ;-)
The only major pain was discovering an unpatched bug in the broadcom wifi driver shipping in RpiOS. Setting up a page to capture my tinkering. There is a lot of discussion on this Flickr thread: https://www.flickr.com/groups/alphasmart/discuss/72157721921183163/72157721922020629
@angel I keep playing with different keycaps to make the ultimate tiny monster. Though I'm still very amused with the food themed keys the creator sent it with - more on the nose "delicious"