I still like this idea.
What can I do to make it actually happen?
Request the mailing addresses of everyone who wants to participate, then start.
I've been brainstorming quite a bit about this actually... there's a lot of fun possibilities.
I could send one letter out to a random individual on the list of people who send me their addresses, or I could send multiple letters.
If I send multiple letters, they might all be identical copies, or I might make them each slightly different.
I might lie completely about what I'm doing and say I've only sent 3 letters out when I actually sent 4, for the sake of Holy Confusion. And one of them will actually be totally different from the others...