In addition to serving as a server book for this instance, I think these docs are a great resource for users to see an end to end installation on Solaris (almost all of it is applicable to Linux as well).
I will continue to update these pages as things change and will also document exactly how I have configured the Nexus application as well, to show how to properly configure Repository Targets, Permissions, Staging Profiles, etc.
Here's the link to the docs, Enjoy.