Have there been any further thoughts on this? I am being asked to provide similar functionality on our forum as well. In our case we have a MOOC being taught to thousands of students, with about 120 teaching assistants. The teaching assistants are all part of one group (Red-Belt using the martial arts metaphor) and we are looking for a quick way to provide a roster of that group. The approach suggested here would be close, even better for us would be to pull profile info:
full name : username : about me : website : posts : likes: views : activity