It's probably not possible at this time. There may be some potential
candidates around the corner that it may be possible to totally free (at
least the core board, ie not necessarily including hard drives, etc). There
are issues with the wifi being integrated on most of the chromebooks. If you
can't replace the wifi its a no-go as all the integrated chips (like ath6k)
are dependent on non-free firmware. If we can find an upcoming model with a
particular set of chipsets now shipping and also has a mini pcie half height
slot (some do) then it might be possible to free one. These would potentially
be better potential candidates I feel than other systems being worked on
right now.
