I have been using Espresso for more than a year now, and I love it. I am considering writing a book / recording a video class / giving talks & workshops on the topic, but it is a substantial amount of work so I want to gauge interest before I start.
Please see the outline here: http://blog.sqisland.com/2015/04/espresso-book.html
There are 3 sections:
2) Talk / Workshop