For what it's worth, Pinboard also has an API that you can use to manage your data, including making backups. I use it for exactly that, especially since he's

For what it's worth, Pinboard also has an API that you can use to manage your data, including making backups. I use it for exactly that, especially since he's quite upfront (and funny) about how hooped everyone could be if he's ever hit by a bus.