I would be interested also in more advanced tutorials highlighting
different tips, techniques, and shortcuts along with more advanced usage
that might be non-obvious.

How about in learning to program in Ruby and in using Google's SketchUp
API? It's accessible if you are familiar with object-oriented
programming. How's that for "advanced usage that may be non-obvious?"
You might see the book, "Automatic SketchUp", by Scarpino for a
glimpse into this perspective. The first 3 or 4 Chapters are available
online at no cost.

Bill