Dear 1Passwors -
Two factor auth is becoming a huge deal and truly a life saver for me and many others. Also, to be extra extra secured new tech like yubico has this neat little USB key that is used as well!!
Please seriously consider adding support for their Neo project since its AgileBits decision for planning on adding two factor authentication. Since 2FA is implemented by each site/service, it is up to y'all whether this will be a much needed, popular, SECURE feature!
Yubic does open source libraries and plug-ins that sites and applications can use to integrate various 2FA options with the YubiKey (https://developers.yubico.com). LastPass, Password Safe, and KeePass all have 2FA methods that use the YubiKey (LastPass - Yubico OTP or Authenticator; KeePass - Challenge-Response or OATH-HOTP; Password Safe - Challenge-Response).
There is an interesting post on AgileBits' website that I came across a couple of months ago when looking into this - https://discussions.agilebits.com/discussion/comment/114744/#Comment_114744