A thought experiment:
What would you say if you had 15 minutes with a guaranteed audience of 10,000 people listening to you? How about a 1,000,000 listeners?
TheListServe.com is an email lottery that gives you a chance to find out. Each day, a random user is selected from everyone on the mail list. That person gets a chance to send an email to everyone on the list.
The more people who sign up, the more listeners there are.
Why I think it's cool:
Just thinking about what I would say, and asking my friends what they would say has been very fun. Even if I never win, it's neat to ask people what they would say.