This experiment has sentimental value for me, because my first paid tech job was helping with a NASA educational project for kids called "Ask an Astronaut" -- most of which was about recycling poop to grow veggies on Mars. Good to know you're halfway there, astronauts!

You should see their joy in the video:

More colorful PandaWhale commentary on space lettuce:

http://pandawhale.com/post/66272/sheer-joy-of-astronauts-eating-the-first-space-grown-lettuce-and-veggies

Enjoying space lettuce on earth in Japan:

http://pandawhale.com/post/67967/japanese-plant-experts-produce-10000-lettuce-heads-a-day-in-led-lit-indoor-farm

And now for some color:

http://gizmodo.com/astronauts-veggie-garden-in-space-is-about-to-grow-a-bu-1750390542