Quadnet does not supply NewsGroup access due to high bandwidth concerns. You can access free newsgroups by doing a search in your browser for the word 'newsgroup'. There are also great for-pay Newsgroup Servers (ex. Supernews.com) that offer binary files and a larger selection of newsgroups and messages per newsgroup.
There is a large list of newsgroups at Google.com (http://www.google.com/grphp?)
The following are links to lists of publicly accessible NNTP Bots to search for UseNet servers:
http://echoes.free.fr/nntpbot/ < Great News Bot!
http://freenews.maxbaud.net/newspage.html
http://www.newzbot.com/
http://www.newsservers.net/
http://www.arcwebserv.com/jumpsite/usenet.html
http://echoes.free.fr/nntpbot/