There's two proxies for the HN links: gemini://drewdevault.com/cgi-bin/hn.py and gemini://dioskouroi.xyz/top .
I've seen a forum/board or two, but none have really taken hold.
Hopefully as it takes off there will be enough content for the links to be other Gemini links. Not much point clicking over to the browser.
There's lots of Gemini content! It's just not on those pages. Check out GUS[1], CAPCOM[2], and Spacewalk[3]. GUS is a search engine, and the other two are self-hostable aggregators.