I wonder how expensive it would be to make a really really tiny FPGA with a few tens of cells in it.
As in, I realize chip design is expensive and crazy complicated, but small runs are only around $5k or so. I'm wondering if FPGAs manufacturing has similar costs - or at least similar-ish enough to be potentially interesting.
If you could go from zero to tiny prototype FPGA with 5 or 6 figures, you might just be able to pull some VC money out of thin air to kickstart with. Or you might not even need to go in the VC direction, there's bound to be a group of people out there with collectively enough between them to kickstart something like this. I'm uncertain if Kickstarter would be a horrible disaster.
With prototypes made, you'd just need to send a few of the prototypes out to some smart PhDs and hardware hackers, get them to show what's possible, and that could be a viable way to get further investment and complete the bootstrap cycle.
Obviously the point of all of this is to make a chip that's as open as reasonably possible. Physical chip manufacturing is likely to be NDA'd (for example the SRAM would probably be supplied as a reference design from the foundry) but the "how to poke this with software" could be super open. Would be fun.