Written Among the Stars

[NASA, space]

Send your name to the asteroid belt on the Dawn spacecraft. Your name
will be recorded onto a microchip that will be placed aboard the
spacecraft accompanying it on its mission to the asteroid belt. After
entering your name below, you will have the opportunity to print a
document that verifies your journey aboard the spacecraft.

http://dawn.jpl.nasa.gov/DawnCommunity/Sendname2asteroid/
index_asteroid_blt.aspx

Also - did you sign a list like this on NASA's website about 8 or 9
years ago? That list, also engraved on a microchip, travelled into
space aboard the returning STARDUST. A list of the names can be found
here:

http://stardust.jpl.nasa.gov/overview/microchip/index.html