We now have an archive for guides, found here.
I didn't see any thread in the HotS forum about hero gameplay and talent loadouts. I'm not even sure if this sort of thread is helpful in a MOBA type game (I know styles and talents change from random matchmaking vs organized teams) but for me personally it's been really helpful to look at simple guides explaining why some talents are worth taking over others.
Most sites (currently) are lacking in any sort of 'guides' for heroes so sometimes when I see a hero I want to play I get a little overwhelmed by some of the choices (HotS is the first MOBA I've ever played, I'm NOT even close to proficient).
So would an organization of player-made hero guides/loadouts be something helpful? (If there is a place with guides for all the heroes then feel free to ignore this/point me in the right direction) I just haven't seen anything to that effect.