I've created some new topics, and slightly rearranged existing sections and topics. Maybe this will stimulate a different sort of discussion.
These are by no means permanent, though. Let me know what you think about these, suggest others, or point out ways in which the new sections are completely pointless and stupid! It's not too difficult for us to move threads around from one topic to another, so if one or more of these doesn't work, we'll move the topics out of it and rearrange around it.
I haven't gone through and started moving old threads to more appropriate topics, but may do so soon, depending on reaction to the new categories and topics I've created.