I'm a little sad that this would require me to use the 1Password cloud-service. I would never want my 1Password vault to be on any server outside of my control.

I'm a little sad that this would require me to use the 1Password cloud-service. I would never want my 1Password vault to be on any server outside of my control. While I completely trust agilebit's intentions, I feel that their cloud service adds a very major attack surface. Someone like the NSA would certainly be able to obtain copies of the encrypted vaults, which means that everyone's vaults are just one bug/backdoor in the cryptographic stack (remember Debian RNG bug?) away from being exposed. Hence, I only use WiFi sync for 1Password. It would be nice if 1Password added a sync option through my own WebDAV server. I'd then be happy to pay for a 1Password cloud account just for the TravelMode feature, as long as the vault data itself wasn't stored anywhere outside of my control. Having my own server would mean the the NSA (or whoever) would have to do a targeted attack on me personally, which is a whole different ballgame from everybody's encrypted vaults sitting on agilebit's servers. In the meantime, if I had to cross the US border (as a non-citizien!), I would probably delete the whole 1Password app from my phone before crossing, and then restore the entire phone from backup afterwards.