I just wanted to chime in here (hope that’s ok).
More “social” features are planned, but we’re waiting for two rather hefty changes to the website to be completed before we can make serious progress on them; the initial changes increase the reliability of the “core” that automates getgosu and allow us to do a great deal more interactivity on the site with a lot less effort, which includes things like chat and live “online” lists and a whole host of options at our disposal like you’d see on popular, more mainstream social networking sites.
I can’t give any “drop dates” for these changes, but I can assure you the technical team is working on them.