SysAdmins' Chronicles

Create a standard SSH keypair by using the ssh-keygen command. When prompted for a passphrase enter one. Copy your ~/.ssh/id_rsa.pub to your destination's authorized_keys file. Now login to your destination from the Terminal with ssh. You will be pleasantly surprised with a pop-up box asking for the password associated with the id_rsa SSH key. It gives you the option to store this password in your Leopard keychain if you wish. This effectively takes place of using a ssh-agent to store SSH keys.