They do have a job board, but they don't use it. Everything is done through email. In the email they say, "You must EMAIL me back with the location that you can complete and the earliest date you can assign. Remember – we don´t have a jobboard!"
They respond very, very quickly--like within 2 minutes. Maybe by the time they get to my name on their list, they're desperate and waiting with baited breath to get the assignments done , but they are almost as fast as a self-assign.