This is a German site so you'll need to run it thru Google Translate. Lots of information on Indexers and Providers.
Tons of information on Usenet as well as Torrents.
Can be a little hard to navigate but still has a lot of info.
r/usenet has a large following and a great deal of info thru its wikis.
r/UsenetTalk has a great deal of info thru its wikis.
Another big player in the Usenet community. Use the site map as a starting point.
Established site for all things Usenet.
Not very many reviews but still worth a look.
I guess you could call this the Dutch version of Usenetreviewz. You'll need to google translate.