I'm considering using GitHub as the primary (or only) single sign-on for my new web service. Even with the occasional downtime, I still think it's a great choic

I'm considering using GitHub as the primary (or only) single sign-on for my new web service. Even with the occasional downtime, I still think it's a great choice for hacker-related web services. I'd rather take my service offline every few months than make people remember yet-another-password.