I hope this is the right place to fill a feature request.
So before I go on, let me tell you that I love 1Password.
It is one of my most used tools and it keep all my passwords synchronized between Mac, Windows, iOS and Android.
To make it even better, it would be great to have support for ssh agent authentication.
All ssh keys could then be stored safely in 1Password and putty (as the most widely used SSH client on windows) could communicate with 1Password to retrieve the keys.
Keepass offers a plugin for that which could serve as an example for such an integration.