One of the bigger changes with Oracle Solaris 11 has been the move of a lot of system configuration into the Service Management Facility (SMF) configuration repository and away from configuration files stored in /etc. This not only gives us a much more structured storage approach, but also provides a much better experience of what happens to administrative customization during a system upgrade. With the introduction of repository layering, configuration can now be more seamlessly managed across the system - both customizations made directly to a system, customizations as part of a wider site profile, and the default configuration that's provided by Oracle or any other 3rd party vendor who are integrating into Oracle Solaris 11. This does mean, however, that administrators will need to get a lot more familiar with SMF.
Over the last few weeks I've been working on writing more content to help administrators with their understanding of SMF. We've added a new SMF Technology Page on OTN with a ton of content - whitepapers, technical articles, cheat sheets and screencasts. Here's a screencast about how to configure services with SMF, enjoy!