We are actually looking at this problem now, folders would be a really welcome addition to object packages (that is to say, a hierarchical organization for object packages).

Our present plan is to expose a web interface for un/archiving object packages on demand (we already have such an interface for transferring object packages to our DAM).

My other thought was to treat global object packages like a communal fridge -- periodically (2x year?) turning all global object packages (with some exception) non-global, and letting people bug my department when they need it (or use the web interface) to turn object packages back on.

-Ryan Donahue
George Eastman House