I've posted a few notes (lots of credit to Peter, who left these ideas sitting around unsupervised so I could copy them). If you're already watching this page, you should see this message in your Echo Notifications and be able to take a look. This is all the equivalent of "pre-alpha" notes, so expect more content over the next few weeks, and feel free to ask questions and/or tell me which section you'd like to see expanded first.