Passpack recently gave users the option of signing in with their OpenID, Google or Windows Live account. Now you can use Gmail, Hotmail, Yahoo! and Facebook with Passpack.
Keep in mind that if you’re not a Passpack user yet, you can sign up for an account using any of the above. And if you are a Passpack user, you can associate Yahoo! and Facebook accounts to Passpack.
Now the big question! We need the help of our users – TELL US:
Who should Passpack to add next? Twitter or FriendFeed?
The (old) Passpack Blog 