I forgot I did this a few months back.  I went to futureme.org and tested it out by sending me the following message that I just got today.

---

(The following is an e-mail from the past, composed on Wednesday, September 20, 2006, and sent via FutureMe.org)

Dear FutureMe,

Hope you have a good birthday.

PastMe

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
delivery brought to you by FutureMe.org
like hearing from your past?
we like donations:  http://www.futureme.org/donations/
(your support helps keep FutureMe free)
- - - - - - - - - - - - - - - - - - -  - - - - - - - - - -