I recently heard about the LIFE (Living Interplanetary Flight Experiment) on Wikipedia.
http://en.wikipedia.org/wiki/Living_...ght_Experiment
What do you guys think?
EDIT: I forgot to say, but when it's launched they could have a combo pack like the "Heart" Packages, with some of the occupants of the LIFE experiment, looking like a rocket or something. (Water Bear, Yeast, possibly even a Martian Life Bonus!)