Turn HN into twitter (sans 140 char limit). Posts are "unstructured", bit do retain @reply information. User @a and @b posts a link about Airbnb, user @c wants

Turn HN into twitter (sans 140 char limit). Posts are "unstructured", bit do retain @reply information. User @a and @b posts a link about Airbnb, user @c wants to reply, says "@a @b what #Airbnb really needs to do is bla bla bla.." Then, the front page becomes a list of "trending topics". Topics are determined by some kind of statistical analysis of the overall conversation. The /new page is a list of new posts that are not @replies, or something similar. Order/score can similarly be determined, such as by reply counts. More computationally intensive, but more "true".