Yes, this website has been mentioned before, but I can't find it through search either.
I remembered that I commented on the song Pokarekare Ana, and I was able to find a link by putting Pokarekare in Search. In the thread that came up, I found where I had linked to the folk song site (thread 81712), but I am sure that that site has been discussed before.
Maori song

But your mention and link are not redundant since any prior link is lost in the Mudcat swamp.
Sites like this one should be listed in FAQ, if that link ever gets re-organized.