When I say great content, I mean something that can federate a large audience and serve as a reference and inspiration for others.
Today most of content creator are producing for the rich web, so most of the interaction happen there, and as a result most of the new content is formatted for the rich web.
From the top of my head, Phrack Magazine [1] is the only examples I can think of text based good content. It is mostly aimed at a very specific audience, but I am sure they are other examples out there.
Which basically lead to the other question of discoverability...