(Hopefully jeffbarr will read this)
How does one get access to try this out? The article mentions it's available in us-east-1 (N. Virginia) however I checked the RDS tab in us-east-1 and I don't see it listed. Only the MySQL version is available.
The "... you can sign up now for access!" link points to https://pages.awscloud.com/amazon-aurora-with-postgresql-com... but it just redirects to https://aws.amazon.com.