PostgreSQL, the Worlds Most *popular* Open Source Database

Apparently Postgres has achieved a new level in popularity; from a [ newsforge article] released today:
A potential customer may have specialized requirements based on technology it already owns. For example, OpenXchange supports only the PostgreSQL database and Tomcat Java. You can use freely downloadable open source OpenExchange however you want, and rely on community support if, for instance, you prefer MySQL over PostgreSQL or JBoss over Tomcat, but if your company believes it must have commercial support, these are not options OpenXchange offers. The company has consciously chosen to support only the most popular option, not every possible one. “Sometimes,” Kusnetzky says, “this will drive customers to competing products.”