Amazon Web Services Feed
Amazon VPC Flow Logs extends CloudFormation Support to custom format subscriptions, 1-minute aggregation intervals and tagging

Amazon Virtual Private Cloud (Amazon VPC) flow logs customers can now use the AWS::EC2::FlowLog resource to create custom format VPC flow logs with enriched metadata fields and publish them to either CloudWatch Logs or S3, capture VPC flow logs at shorter aggregation intervals of up to 1-minute for quicker and more granular network visibility, and tag existing or new VPC flow log subscriptions, all directly through AWS CloudFormation.