@gauge hi, no there isn't such a list but maybe it would be a good idea to set one with all the core + app developers and the way to sponsor them. There are individual developers pages though.
About the SDK, Rodney is working on that precisely 🙂
No, there isn't any problem for us using the word 'ubuntu', we have the permission from Canonical to use it.
If you have more questions or want to get an answer directly from the top, this Saturday is going to be a Q&A. You can ask here https://forums.ubports.com/topic/1769/q-a-38-this-saturday-13-10-18-at-19-00-utc