Keep in mind that even without a specific template for SSH (or other) keys, you can always use a Secure Note to secure items like this. You may want to consider having any SSH key(s) be stored in the Notes field of an Accounts > Server category item too since you likely have other attributes about the same system to keep track of.
Couldn't 1Password support ssh this way somehow?
Right now, when I ssh from my Mac, I get a dialog box that pops up to ask for the passphrase. I'd like to somehow have ssh get that from 1Password.
AgileWeb -- to enable communications with other apps, instead of focusing on (or fending off) requests for interaction with Application X, App Y, App Z, etc., you might consider making 1Password as script-friendly as possible, building in comprehensive support for Automator, Applescript, or other external, user-customizable scripting frameworks.