That looks great! I should really stop relying on the human-friendly documentation and dig into the manpages where all the gems are. If I were really paranoid,

That looks great! I should really stop relying on the human-friendly documentation and dig into the manpages where all the gems are. If I were really paranoid, I'd still be a little worried about possible information leakage via the local cache, which seems to be necessary for deduplication to work, especially without being able to read previous archives. But I don't have enough money to buy that much tinfoil :)