An Introduction To The Scala Programming Language by Bill Venners
From the post:
As those who know me will most definitely know, I have been dabbling with functional programming again. At first with F# and now with Scala. Just thought I’d share this webminar about it. Now I am starting to get it, back in university I never quite got what the deal is and found it very hard to comprehend.
Somewhat dated (2008) but interesting background and idea material. Does have some examples.