[jey]

This used to be extremely common as a naturally viral way to harvest email addresses, the prompt was "put in the email addresses of your crushes".

What's your twist that sets it apart from the usual variants? (Sure, building it on top of Facebook could potentially provide some additional benefits, but what are they?)

[MarkIceberg]

Well, frankly I wasn't expecting frontpage HN. This was just a sideproject that I was doing to get acquainted with golang. With respect to your concern about email address harvesting, the facebook graph api doesnt not give the app access to friends' email addresses. We only know the emails of the people who sign up, and it's used for notification purposes only. :)