I've got a lot of questions about when/if Thunderbird will have a newsgroup option, the answer is simple, it's already there. :) In this article i will try to show you how to set up such an account.
First, go Edit > Account Settings > Add Account..., and you will get this window:
Choose "Newsgroup" and press "Next"
Fill in your e-mail address and the name you want displayed, when this is done press "next".
Now you need to fill in the news server, now I don't know which one you want to use for this
account, however, I'm going to use "news.mozilla.org".
Name this newsgroup, choose whatever you like, I'm going to use "news.mozilla.org" for
this example.
Check your input, verify it by pressing "Finish". :)
You should now have a new folder located under Local folders named
"news.mozilla.org",
highlight and rightclick the new news folder and choose "subscribe".
Now you're presented with a window to choose which groups you want to
subscribe to. There's a group called mail-news on
news.mozilla.org that is a valuable resource for new users - if you
would like to subscribe to it, search for mail-news and subscribe to
the group that comes up. With other news servers, you could also
search for groups with the name car and so on.
Unless you have a good connection or a lot of time, choose to
download 500 headers - these will give you the subject line of the last
500 messages which you can read.
Ready to go. :) Enjoy.