I've got it working fine with BT Sync. All you need to do is put the .agilechain file in a sharable folder and load it up with 1password on both ends. It syncs up just fine.
Don't get me wrong. It works for me including a slightly hacky way on iOS.
However, it would be nice to have official iOS 1Password support since I believe 1Password can leverage BTSync via API much like Dropbox for a much more seamless experience.