Could you please add an option in the config, that allows showing/hiding the names of vanished players on the TAB player list?
Also, a command that would show/hide my name on the list would be nice (something like "/nt on|off" - no tab)

Not possible with how Bukkit works. Ask Bukkit to implement API for it.

Already a ticket about bukkit compat so I'm closing this one.

We're working on a plan for better vanish specificity on what is hidden and what isn't, but that isn't coming this month.