Mozillians has an inivitation system that let's vouched users invite others to join Mozillians. These users who join are automatically vouched.
Let's say you have a large list of contributors to invite to your phonebook, well we thought of that.
You can format a file (
myfriends.txt) with one email address per line:
email@example.com firstname.lastname@example.org email@example.com
And feed it on the admin node like so:
./manage.py cron invite myfriends.txt
And voila! Invitations will be mailed to your friends.