My colleague, Albert White, has published a useful article detailing how to set up local IPS repositories for use within an enterprise: How to Create Multiple Internal Repositories for Oracle Solaris 11
This is useful as most servers will not be directly connected to the Internet and most customers will want to control which Oracle Solaris SRUs (Support Repository Updates) are "qualified" for deployment within their organization. Setting up and managing Internal IPS (Image Packaging System) Repositories is the way to do this.
The concept can naturally be extended and adapted. For example, Albert talks about a "Development" Repo containing the latest Oracle Solaris 11 deliverables. When qualifying a software level for deployment across the enterprise, a copy of a specific level could be taken, e.g. "GoldenImage2012Q3" or "SRU8.5", and once it passes testing, be used to deploy across the enterprise.