Newsgroup Ninja is a good unlimited Usenet provider if you're in need of one, $59 AUD is a decent price. Promo is from a while ago but it seems like they never took it down.
They are an Omicron/Highwinds provider so this will be redundant if you have NewsHosting, UsenetServer, NewsDemon, etc.
Features
Ninja follows DMCA
50 SSL connections
4000+ days retention
Unmetered access
US and EU servers
They claim 7 day money back guarantee as well. Their support is meant to be good but not sure what would happen if you went ham, downloaded heaps and expected a refund.
They seem to only accept Credit Cards and not PayPal if that's a deal breaker for anyone.
noob question: Is there any way to browse what they have without signing up?