That’s a very good question.
There are several different models we could follow, but I imagine that in the long run, we will move to having reference-type questions here on meta, not on main. This seems to be the direction that other language sites are taking, although I’ve only looked at a couple of them so far.
For example, Flimzy’s question about the existence of a Portuguese dictionary with IPA pronunciations probably should be migrated here to our meta. I reopened it without thinking things through well enough, mostly because we had not yet had the discussion that you have yourself just been kind enough to raise for us.
What I am uncertain of is whether that sort of information should be under one rather generic “resources” question, or whether there should instead be one question for dictionaries, another for something else, et cetera.
As these questions become better developed and settled in, we can also have links to them from our Help Center, which has yet to be (much) customized for our site.