Awesome! I can't get enough of his books. He never explicitly mentions permaculture in the Mars Trilogy, but he does in the "40 Signs of Rain" series and I think in 2312 as well.
Another thing to look at is
Gaiome, which explicitly combines Permaculture and Space Exploration.
Also,
Vinay Gupta does thinking along these lines. I remember him tweeting "Spread life through the universe! Go out and f*** the stars!"
One problem with Permaculture and Space Exploration is that space programs require such a HUGE economy to exist. Even with companies like Virgin Galactic working to make access to space cheaper, just getting to space requires a huge advanced industrial economy.
Right now, Permaculture seems stuck at the garden/small farm level. Other than some exceptions like McDonough and Braungart's "Cradle to Cradle", permaculture hasn't infiltrated INDUSTRY to any great degree. PC will have to go REAL BIG in order to support a permaspaceprogram.
I hope it does!