As far as I understand, it is close to impossible to get the Vivaldi tablet.
It uses the vanilla Linux kernel (not Linux-libre) and 100% free software on
top of it. The WikiReader and the Ben NanoNote (mentioned in this thread) are
not tablets (and nowhere close to deserve this denomination).
The ZaTab ships with CyanogenMod 9, which also uses a vanilla Linux kernel
and 100% free software on top of it. Its bootloader is unlocked. Root access
is available. The user can, for instance, easily installs the latest version
of CyanogenMod without Google crap.
Is there another *available* alternative that better respects the users'
freedoms?