news.mozilla.org has now been switched over to Giganews.
Just a quick reminder: The article sequence numbers won’t match between the old news server at AOL and the Giganews server. This means that you will have a wrong count of which messages are read. (Most likely, all messages will be marked as read, as well as many new ones after that.) It would be best to re-subscribe to your current netscape.public.mozilla.* newsgroups.
Luckily, newsgroups that don’t have a counterpart on the netscape.public.mozilla* hierarchy didn’t have to wait. This means the user support newsgroups are up and running. For the first time ever, there are user support forums on a server actually called “mozilla.org“. 
For more info, read the News Migration FAQ or my Unofficial New Mozilla News Server Information Centre.