One thing I noticed in the Drupal community was that there was no module that displayed all the users for a site in a tree type structure. I needed something like this for an employee directory, but found nothing close to what I needed within the already available Drupal modules.

I took a few hours to write a quick module to display the users exactly how I wanted. In my case the username was in the form of FIRSTNAME.LASTNAME. I wanted to sort each user into their respective tree by last name and then sort based on the last name.

Please feel free to modify the module query so that it suits your user environment. Hopefully this will help someone out who needs this sort of solution. Attached is a screen shot of the module as well.

UPDATE: Please see http://dueyesterday.net/node/34 for the updated version of this module.