Hey, arborman: from which book?
L-girl, if you've got an announcement of a campaign or an action, go to the Activism forum and start a new topic there. If you've got another topic to raise that's more a topic for general discussion, start a new topic under, say, Canadian News or Canadian Politics or U.S. or whatever, or join a discussion that's already underway. A lot of the dunderheaded things that HarperCo announce get noted on a running thread called "It's the new Canadian government, peon," eg, but some new topics are large enough to warrant their own threads.
I don't know where you're navigating from. The full list of forums is on the main index page, but if you want to keep up on the daily discussions, the easiest place to do that is from TAT (Today's Active Topics). From the main forum page you get to TAT by clicking the far-right button on the red bar (as above also); from TAT you get to the main forum page by clicking on the BnR logo.