As I understand it, this thread is meant for looking at your project from an implementation point of view (correct me if I'm wrong).
Well, my proposed project is called "A Modern Interface for Member's Area" and is basically aims at providing the existing (and some new) MM-HK functionality to daily users (not admins) in a forum like interface. They can view conversations, reply, subscribe, unsubscribe, create public profiles and more like your run-of-the-mill online communities. The main aim is to try and make MM easier to use from a new-user point of view. (And for personal reasons; I have signed up for three MM-using communities and I cannot keep them straight)
What I need help with as a starting point (at least) is how to "link" the functionality with the (django) front-end. One solution (thank you abomard) is using the API that (postorius also uses) MM3 and HK have support for. But since I have no experience with REST and I think some other projects are working on the apis... I would like to hear your views.