Here?! HN is a collection of references to articles from the most varied www sources...
n submissions per day over m different sites, from l users which provide partial indirect profiles: you think one may not find new interesting sources? It would be a job in itself, to check where the submissions lead you.
(n, m, l: maybe dang could provide stats, it would be interesting. Edit: since we are here: most common www sources; www sources with the best upper quintile of upvotes in submissions (i.e. when they are noted, they really are)...)