We have some announcements coming that should be able to help with this. By the way, welcome to Hubski. I'm glad you already like the place enough that you are interested in making it even better. Any suggestions are always welcome.I am aware that this is not exactly a major issue, as Hubski is currently working out fairly well, but i feel it would make for a larger range of opinions to be displayed did more people feel willing to add to the experience.
It would be great to get more people to comment and post, but some people just aren't the type to do it. Hubski, like other sites, serves many different functions for different people. I don't think the challenge is to necessarily change the behaviors of the people that are already visiting the site, I think the challenge is bringing new, interesting people to the site. But how do you attract the right people? How do you let people know? We don't advertise, we rely on word of mouth. If you know people that could add to the conversations here, by all means invite them.