I've noticed that it's really hard to see who's in your group and who's not. What I'd like to suggest is that, on the groups page ( alpha.glitch.com/groups/ ), when looking at groups you're a member of, turn the counter that displays the number of members into a link that goes to a page with a list of all group members, arranged like the friends list in your profile.
That way, you not only know what groups your in, but can quickly tell, at a glance, who your groupmates are!