I think most roll their own (we did just did) since it's easier to integrate with your existing authentication system. Take a look at: http://railscasts.com/ep

I think most roll their own (we did just did) since it's easier to integrate with your existing authentication system. Take a look at: http://railscasts.com/episodes/124-beta-invitations http://railscasts.com/episodes/124-beta-invitations for some decent starting points.