I have published an InfoQ news post about the AWS team's efforts to accelerate the evolution of CloudFormation's built-in serverless support:
Amazon Web Services (AWS) recently open sourced its Serverless Application Model (SAM) implementation and added a new event source for CloudWatch Logs subscription filters. The preceding release featured a comprehensive expansion of options to configure and deploy REST APIs via Amazon API Gateway, including support for CORS headers, regional endpoints, and binary media types.
[...]
Continue reading the full post in AWS Open Sources and Expands Serverless Application Model (SAM) Implementation.