Well, the Planetary Society hasn't typically had much truck with human spaceflight in general - at least my impression from the brief time I was a member was they were on the robots side of the robots vs. humans debates. Maybe that's changed.

Anyway, the groups mentioned in the news article include the ones I know about that have worked to support and modify US human space flight policy. Saying the ISS is about science, as NASA keeps insisting, seems to me a long-term losing proposition because major new scientific discoveries in space will only come when we have full-scale universities and research programs up there - there's not a chance of it coming from just half a handful of people in space playing around in their spare time.