Portland is a town where, while walking to the gym, you can come across someone sitting at a sidewalk table of a local cafe, leafing through a hard-copy of Programming in Scala. We chatted for a moment (even though I was not quite awake yet). One more thing for me to do ... check out Lift.
And, yes, he actually had a print shop print and bind the PDF (as the book is only available electronically right now).