I am currently working on SharePoint 2007 (MOSS) for a Web Content Management project. Discovered that on renaming a document, e.g. a word document, in “Documents” doclib, if there were references to it on other pages (aspx pages under the Pages doclib), those references / links get updating automatically as well. WOW.
Strongly think that this feature is applicable across the portal, am testing some tasks and will post results shortly.