Genetic Rockets
blprnt.com
blprnt.com
and followup http://blog.blprnt.com/blog/blprnt/7-days-of-source-day-5-sm...
Perhaps also avoiding bounces gives some bonus
As I say, I'd love to know what he's actually using. I've done quite a lot of work in genetic, ballistic, swarm and annealing optimisation systems, and I can't work it out.