The Groupware Competence Center in Paderborn/Germany has implemented a nice tool to manage composite applications:
I like especially the feature to figure out very easily which components are used by which/how many applications. I think that this functionality could be used well by administrators to get a better overview of the system.
There are also other features that help especially the component users/application assemblers. The components and their properties and actions are read and displayed in a nice UI via a Notes database. There is also a way to share common datatypes within a departement or enterprise to avoid an explosion of custom incompatible datatypes.
The management application might even be extended in the future to change certain aspects of the application design directly from here.
Please let us know how important this type of managebility capabilities are to help us figure out whether we need to provide some of these functions as part of the product.