Google Groups

Formerly "DejaNews", Google Groups is a glorious experiment in free speech! This oceanic database of over 800 million posted "Usenet" messages from people all over the globe constitutes the largest bulletin board in the history of the world! It's fully searchable, and you can post your own messages free of charge. (Tip: don't use your primary email address in your posts! To avoid spam, use a temporary email address.)