I'm wondering if combining Racket with AWS Lambda (https://github.com/kpiljoong/aws-lambda-racket) would be a good way to play with Racket and do cool things with it. I've done a bunch with Emacs Lisp but always felt weird writing a server application with elnode.
For anyone who enjoys programming language dives, I recommend Racket fully. It's simple and powerful in various ways.