What are some alternatives?
GroupSpaces - Free Group Website, Membership Database, Listserv Mailing List, Online Group Management Software : GroupSpaces
Giganews - Giganews is the world's best Usenet provider. Offering the world's highest quality retention and fastest speeds. Sign up for a free 14 day trial.
Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
Astraweb - Premium Unlimited Usenet news server services.
Yahoo! Groups - Online discussion boards from Yahoo!
GetNZB - GetNZB is a free Newsreader software with integrated NNTP access for downloading files from Usenet.