At this stage of the site's development, I don't think we can. You can start a new "thread" by commenting at the top of an existing topic, but I don't think there is any way of making a new topic. If I'm not mistaken, the site is still in a beta release, just recently being opened for the public. We haven't had an Ambassador's meeting since the alpha release in March, but I'm going to raise that up during our next meeting.
How do we create new topics on this website?