[dbattaglia]

I know this is a very specific case, but as a professional .Net guy I'm finding this book to help out tons: http://pragprog.com/book/cerailn/rails-for-net-developers

Also reading The Rails 3 Way (http://tr3w.com/), but I wouldn't recommend this one right away unless you are pretty comfortable with programming and Ruby already (or you know another language and pick up fast).

Also I second http://ruby.railstutorial.org/, that one is free and super helpful.