round-robbin

I am in need of assistance on how to construct the following:

1. Maintain a list of responsible users in a list (NodeQueue ?)

Event: A User submist a new node of a specific type (CCK-based form)

Requirement:
Allocate the next person from the queue to be responsible for reviewing the Node.
Place the person back into the queue, at the back of it.

(The Submitter does/may not necessarily know who got assigned to their submission.)

Useful for: Round-robin Job Allocations, Advertising-Lead Wheels, etc.

Any help would be highly appreciated.