let us know when you do.
Will do. I already registered a domain, codatricks.com (nothing there yet), will start putting out materials as soon as I finish with my current other stuff. Firstly I want to write a post about some best practices how to approach Coda and organize your docs. Actually, the Coda team did a very great write-up on that in their recent post about 
formula performance.
The best way to learn Coda for me was looking at the template gallery. I remember how confused I was the first time I saw Coda (it was Product Hunt Makers Festival), and how quickly up to speed I got when I saw what was possible and how, due to the templates.