Channing Walton

I may be a little biased, but if you need some good introductions to Scala have a look at the free books from https://underscore.io/training/ - click through to each course and there is a free book.

I've used Lift on several web apps for Banks, as well as some private projects. Lift Framework

I've been using scala commercially since 2008 in Banks and other projects. Scala