PosgreSQL: how to run on EC2 with EBS

Ron Evans has recently blogged in great detail about getting PostgreSQL up and running on Ubuntu images on Amazon EC2 with EBS storage for the database files. Basically, you use EC2 to provide the server running PostgreSQL and you use EBS, elastic block storage to create a volume that you mount to hold the database files. Presumably, you can create a second file system to hold WAL segment files, but perhaps you just use S3 to store these.

The next step would be to learn how to create PostgreSQL clusters on EC2. This isn't much of post, but it is useful to me.