NASA and JPL are taking names to put on a microchip being attached to the Mars Rover being sent up in 2011. You can add you name to the chip and get a certificate to print out with a certification number to prove you did it.
I got mine! Get your name on the chip and go down in history.
http://mars9.jpl.nasa.gov/msl/participate/sendyourname/index.cfm
I got mine! Get your name on the chip and go down in history.
http://mars9.jpl.nasa.gov/msl/participate/sendyourname/index.cfm