If you've developed Smart Client applications, especially of the CAB/SCSF flavor, you've probably also thought about Click Once for deployment. One of the big attractions of this architecture is the loosely coupled modules that can be independently developed and then dynamically included at runtime. All this magic however causes one to ask "how do I get all of these modules/assemblies together into a single Click Once deployment?" The answer is the Manifest Generation and Editing tool (available in both command line mage.exe and ui mageui.exe)
There are already plenty of good articles/blogs on how to use MAGE and integrate into your build process. Here are a few that helped me along the way:
Deploying a CAB/SCSF Application with ClickOnce
The fix for MAGE impairment
Administering ClickOnce Deployments