Thanks for the reply. I would have liked to be there for that conversation--if you're planning on doing any "sidebars" with interactions among the races, to help flesh out their differences in the world, this would make an awesome one.
They don't have to be huge stories--1000 words would be more than enough--and that would be enough to help flesh out the different races, compare and contrast. Besides, without that, much of the time, players act as just "humans in alien costumes," and while they may come from different cultures, but they otherwise seem to take up the same motivations.