Being a noob, I just noticed the different boards below the main forum feed. I had been just posting to the main board, not realizing that there were other places to post...
It would be easier to post a thread if I could choose which board that I would like to post my comment to, from inside the Create Thread form, rather than scrolling to the bottom of the forum screen and navigating to the board that I want to post on and then clicking on Create Thread.