Is it possible to create a Nodequeue of Nodequeues?
Nodequeue supports Smartqueues.


  Smartqueue API
  
  Nodequeue provides a robust API that allows other modules to define
  smartqueues, which are associated with external data. For example, the
  included taxonomy smartqueue creates subqueues for a given queue for
  every term in the chosen vocabulary. Nodes are then only eligible for
  subqueues whose term matches the nodes terms. This makes it very easy
  to have queues for each category without cluttering the management
  page.


If the default smartqueue's dont meet your needs you could leverage the API to write your own smartqueue that uses the queue's you've made for your users.

EDIT:

Perhaps see Smartqueue for Content Types.


  This module provides a smartqueues based on avaliable content types.
  It adds a subqueue per node of selected content type to hold an
  ordered queue for nodes of another types. Any of these types can be
  used for smartqueues as well to hold additional levels of nodes
  grouping. So you can build very complex informational structures
  powered by handy Nodequeue's features and integration.