A major thread on Hacker News today and the tech blogosphere last week. What looks like one of the largest apps built on cloud services runs on Postgres- or more exactly pgpool-II. The architecture is worth checking out: http://aws.typepad.com/aws/2008/12/running-everything-on-aws-soocialcom.html It wouldn't be surprising to see Postgres win mindshare over all other db's on the cloud.