The message below is copied from a Postgresql mailing list. A vote of confidence in Open Source.
The Consolidated Court Automation Programs (CCAP) of the Wisconsin Court System has migrated to PostgreSQL for all of its Circuit Court web operations. Eight production databases have been converted, six of them around 180 GB each, holding statewide information replicated real-time from 72 county databases. The central copies support audit functions, statewide statistics and report generation, and this web site:
Given the success of this effort, we expect to be converting the other court databases to PostgreSQL.