Wau! - this is fantastic news, and very surprising that you have come so far with it allready.
Your plans remind me though, VERY much of Meedio(S).
Are the meedios team involved in this somehow? helping contributing?
(I actually doubt it though, since you seem to have come furter than them)
Anyway, again great news - I was actually seeing that MP is a "dying" app and got more and more focused against meedios.
Now you made my head spin again