Update: I will be keeping this open until my next day off to allow orders for space bar versions to be ordered.
Will something like this eventually be available on something like MK? I would love to pick up a pack of these once I get the resources and learn how to wire up a keyboard.
I can't answer that for sure, but i3oilermaker did order 850 of the single unit, and 150 of the 2 unit versions for sale on his site. After the group buy the files will be made public for use though for anyone to order. Though at those order numbers they will be a bit more expensive. I am planning on having them published on OshParks internal database deal, here in one of the relevant threads in Making Stuff Together, along with a possible GitHub.
I just had an idea that I don't know if it has been considered, or could even be done. If the spacebar PCBs have a lot of blank space could some kind of mounting holes be made for the teensy?
While this would be possible this is out of the realm of my abilities. The KiCad work for these was a joint (at separate times) between Moz, and agodinhost. There is however the Teensy breakout board that was my idea that OldDataHands built for me that I have ordered. Though I have yet to actually use it yet. There are two versions, one with mount holes (sized for 6-32 thread same as motherboard mount hardware) on the ends and one on the sides to allow for teensy port at the edge of a project box.