I was having a brain wave just now. Could you make a fun website out of this idea. The website doesn't show up on search engines, people can actually not join it unless.....they are invited.
The website contains: chat, message board, links for blogs and other websites, photo album, a page that shows the relation between the invitees.
The idea is, I invite 3 people to come join the site, and mail them the magic pass. Those three people need to be friends and not strangers. Those 3 people get to invite 3 people. Of course you keep track of who brings in whom. (And naturally see how long it takes until via some random route someone shows up again that you know.)
Hmmmm. Maybe I should find someone to work on this together with me.
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