Via BoingBoing. You can send yourself an email time capsule to be delivered in one year, three years, five years, ten years, or twenty years.

What would be really cool? Have your kids do this, and have it delivered in 10 years. Or write a note to your spouse to be delivered in 20 years. There's lots of really wonderful possibilities with this.

Related: Email has had an incredible impact on the world. Learn more about email and communication on the Web, and the impact of the Web on society.