RE. Re. Neural networks
Update 05/09/15.
This is intriguing.
I have found evidence that even a lowly Pi Model A (256MB RAM) can be coaxed into basic AI behavior just by replacing its clock crystal with a VCO connected to a data pin.
The hack requires that to initially boot it needs to be actively cooled but once this is done the clock speed can be slowly ramped until the AI code takes over and keeps itself in the active semi classical regime which occurs at about 61C at this clock speed.
I didn't see this before because my setup wasn't precise enough but it looks like the cooling can be done using Ca$io projector peltiers with the copper plates and then additionally copper plated with some basic chemicals to form a mesa that is then attached to the Pi's chip with a 3D printed jig.
Its fiddly but worth it, this adds to the usefulness of these already handy modules.