I'm not sure if this's been discussed earlier. One of our members wrote to me saying that we should follow the 'quora' model. Currently, we've no mechanism of staying in touch with the registered members. I'm wondering if XF can evolve to make it even more interactive. For example, when a user posts an answer, can the system suggest who to 'notify' so that they give you an answer? How about creating some 'credit' system with points so that people will always have something to aim for? I'm wondering what's quora doing right that can benefit topic specific communities powered by XF?