PostgreSQL is Our New Default | Engine Yard Blog

Perhaps the database meme of the last year should have been "NoMySQL" instead of "NoSQL"

"PostgreSQL’s popularity is growing, and rightfully so: it’s reliable, performant, and competes well with traditional (and expensive) enterprise databases like Oracle and SQL Server. PostgreSQL is completely community driven and has a rich ecosystem of tools and documentation.
A few months ago, we released full support for Postgres 9.1 in the Engine Yard database stack. Today we are happy to announce that we are making PostgreSQL the default database for all new Engine Yard Cloud applications."

PostgreSQL is Our New Default | Engine Yard Blog