In my instance of MOSS the "Content and Structure" interface is available on some site collections and missing on others.
I went to this article to find out why but there was no answer: office.microsoft.com/.../HA101317231033.aspx
My experimentation shows that you must enable the 'Office SharePoint Server Publishing Infrastructure' feature to enable the 'Content and Structure' interface.
What's more? I have found other odd dependencies on the publishing feature that do not seem to me to be necessarily related to "publishing". My problem there is that I cannot find a list of what all is included in this feature. Or what other features might include the same functionality that I want without the rest of the publishing stuff - whatever that is.
When I propose turning on the feature, savvy site-owners ask, "Well, what else does the feature do? and how will this change my user experience?" I cannot find an authoritative answer.
Another problem here is that the publishing feature, which seems to contain a good portion of functionality, is not activated in new site-collections by default. I am working on a feature stapling solution that I will post on CodePlex when it's ready. Stapling is the only method I know of to make sure publishing feature is active by default in new site-collections.
We are hesitating to take this step because we don't fully understand everything the publishing feature includes.