Hi list, hi Piero,
I'm part of the people working on Tails, a live distribution that aims
at preserving privacy and anonymity:
https://tails.boum.org/.
Tails is actually lacking a backup tool, and Grsync is actually
my favorite candidate.
Even if Grsync is already suitable, a few potential improvements have
been listed after testing.
If you want to get involved in the process, you can find notes in the
blueprint, and especially in this part about Grsync:
https://tails.boum.org/blueprint/backups/#index5h2
Hope to read you,
matsa