I can think of two more people in our group at LANL that would give good
talks. Both are computational biology people and do rule based
modeling, and one of them gives a sensible ABM talk.
One is a staff scientist and the other a postdoc. The latter wrote her
own ABM toolkit that seems very nice.
I'm not sure they'd be appropriate for a keynote , but it makes me
wonder if there is some possibility of funding secondary speakers.
It's just that they wouldn't a built-in incentive to go to Swarmfest and
I'd feel uncomfortable asking them to this as it doesn't have an obvious
benefit for them.