Python support was recently added, unveiled at AWS re:Invent 2015. In the same presentation, CTO Werner Vogel mentioned that Lambda is now the fastest-growing service at AWS.

A 10-point plan to vet SaaS provider security (CSO) How to make the most of AWS Lambda (InfoWorld) AMS Lambda functions can be developed in Java, Go, PowerShell, Node.js, C#, Python, and Ruby.