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I have a number of node queues that serve as collections of nodes. I want the user to be able to take those collections (node queues) and add them to a queue, essentially allowing the user to have a node queue of node queues. Is this possible? If not, are there ay recommendations on how I might implement something like this?
also, I'm using drupal 7
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.
This is not exactly what you are looking for, but I did this on my site by having a node (a new content type called "Collections") that is associated with each queue. I needed this so I could have an author, description, date, and other metadata for each collection.
Then I made one more queue that can only contain nodes of type = collection. This is only worth it if you want the benefit of the collection nodes, of course. You can see it in action at http://hastac.org/collections
