Thanks Rare. That gives me a better idea of what to shoot for. I'm a pure mathematician (proof based math, logic, etc) by training, so I'm no stranger to rigor and would rather have the "full details" story than a gloss over. That having been said, I can see the value of getting a book that teaches more by example for the sake of getting up and running. Would it make sense to start with Agile and go on to Rails Way, or if I was bent on getting to Rails Way sooner or later, would it provide sufficiently for a starter if I've gone through a couple of web tutorials already?
Further relevant background: I would say that I'm an intermediate programmer, though most of my programming has been in math software (Mathematica, MATLAB, Maple) until recently when I started working on programs for my company (data collection, robotics, instrument control etc), so I'm moving into new fields, but with considerable related experience under my belt. I've also been playing around with Ruby for a while now (a couple/few months), have read Why's Poignant Guide (hilarious!) and am currently reading Ruby for Rails.
Any further insights are appreciated!