Private SSL/TLS certs, ssh keys, and 1Password database are all stored on encrypted fiesystems (EncFS) and synced across four machines (two at work, one at home, and my laptop) using Dropbox (which is another off-site copy, and has revision archives) and/or BTSync. Those four copies are all OS X Time Machine backed up (and revision archived) - and two of those Time Machine backups are rsynced nightly to separate drives in opposite locations - so all up (not couning Dropbox) I've got copies on 10 separate spindles in two physical locations, two of them in a locked filing cabinet (the work time machine and rsync disks).
I've had a "primary computer" stolen before – and I don't intend to ever have that much grief if (when?) it happens again. I'm confident that even if all the electronics from either one of my work or home get stolen, I could be back into fully productive work-mode in half a day and one maxed-out-creditcard at the local Apple store. (If someone hits both my work and home locations simultanously, I suspect I've got bigger problems that whether I'll have angry clients shouting at me before the weekend…)
I've had a "primary computer" stolen before – and I don't intend to ever have that much grief if (when?) it happens again. I'm confident that even if all the electronics from either one of my work or home get stolen, I could be back into fully productive work-mode in half a day and one maxed-out-creditcard at the local Apple store. (If someone hits both my work and home locations simultanously, I suspect I've got bigger problems that whether I'll have angry clients shouting at me before the weekend…)