Been out trolling again :
Found on VNUNet :

http://www.vnunet.com/news/1160777
Microsystems has officially opened up the source code for its Solaris 10 operating system.

The complete source code will be made available in the second quarter of this year. In a first step, the company has put the code for DTrace up on OpenSolaris.org. The system performance optimisation tool was unveiled last November as part of the Solaris 10 launch.

Sun chief executive Scott McNealy revealed during a conference call that the Solaris code will be made available under Sun's Common Development and Distribution Licence (CDDL). The licence was recently granted official open source status by the Open Source Initiative.

The licence lets users make adjustments to the application without having to disclose too many details about the services that they ultimately deploy.