[The third in an (at least) 6-part series, all code on GitHub as always.]

1. Node.js
2. Node.js + AWS Lambda
3. Python 2.7 + AWS Lambda
4. Purescript
5. Purescript + AWS Lambda
6. Bonus: Purescript + Twitter Streaming

Lambda also allows Python functions, although only Python 2.7. In practice, this won't affect us much …