I was doing my usual reading at Listverse, poring over the Incredible Time Capsules list.
At #2 (or was it #3?) was the KEO Satellite.

KEO is the name of a proposed space time capsule that will be launched in 2010 or 2011. There have been previous spacecrafts carrying time capsules of earth’s existence sent into space but what makes the KEO Satellite different is it will be designed to return back to earth 50,000 years later. The KEO project was conceived in 1994 by French artist-scientist Jean-Marc Philippe. If this ambitious project is realized the KEO will carry a drop of human blood chosen at random encased in a diamond, samples of air, sea water and earth and the DNA of the human genome. The satellite will also carry an astronomical clock, photographs of people of all cultures and an encyclopedia of current human knowledge.

Interesting Fact: The Satellites name is supposed to represent the three most frequently used sounds common to the most widely spoken languages today, K, E and O. Also, every person is invited to write a message addressed to the future inhabitants. The deadline is December 31, 2009. Messages can be posted here.[...]
-Listverse.com

I was so fascinated (read: BALI) and went straight to the message thingy. But I didn't know what to put there so I decided to leave it for later. I put this in my blog because I just want to share the opportunity, in case you're interested.

Here's KEO's site