How to make invites on Rails 3

Question

Ruby on Rails

A typical problem: you need to create a system for creating, sending and validating invites for users on rails.
Used by Authlogic.
I googled - nothing was immediately found, but I always have time to write a bicycle myself.

Answer 1

Probably too late, but still: railscasts.com/episodes/124-beta-invitations

Answer 2

There is another solution - https://github.com/scambra/devise_invitable