Google Apps offers an OpenID API that allows end users to securely sign in to third party web sites using their Google Apps user account.
I want to offer similar functionality - i.e. I want the users of my web site to be able to authenticate using their Salesforce account using OpenID.
Does Salesforce offer a similar API/functionality? I've checked the documentation and seen mentions of OpenID Connect API, but this seems to be in its early stages of development. I've also checked Salesforce's Identity Provider feature, but this seems more geared towards SSO scenarios (not quite sure though - please correct me if I am wrong).