Sun to integrate PostgreSQL into Solaris 10

Sun Microsystems announced that it would begin
including the PostgreSQL database with Solaris 10 as soon as possible , and will immediately offer full support for it, as well as fully integrate the software into the operating system over the next several months.
PostgreSQL will be the second database included with Solaris, though it is expected to be made a more major part of the OS than MySQL.

Anyways its good for PostgreSQL too.
The PostgreSQL project, which started in 1986 as an offshoot of the Ingres database, is BSD-licensed database software that already is available with most Linux distributions.PostgreSQL is also Included in all of the RedHat's Enterprise Server Line.