Jet Propulsion Laboratory(JPL) has a Mars Science Laboratory(MSL) which has a unique project underway.Under the Send Your Name to Mars project they are taking names from world over. Those names will be taken in microchip put on the Mars Rover enroute to Mars in 2011.
Me and my wife have added our names already.
There is a country wise participation list as well. As of 03 June 2011, US seems to lead the list with India coming in at third. I hope the participation from India keeps on increasing.
If you are interested then head immediately to the MSL site as the project closes on June 13th 2011.