When I still read usenet, I used lynx. It's not a very powerful interface, but it's fast, exposes header information in a useful way, and offers good ergonomics.
About six months ago, only two of the newsgroups I followed were still at all remotely useful, and neither of them were exactly great anymore. So I found some web BBS's to replace them (and linuxquestions.org was one of those). I'm unlikely to renew my newsguy account.