As of a couple of weeks ago all locations, including extensions, are now able to offer mobile printing to their customers. Many customers have already been using this functionality successfully. Attached is a brief informational document regarding this service.
Links:
[1] https://my.metrolibrary.info/drupal/tags/printing
[2] https://my.metrolibrary.info/drupal/tags/printeron
[3] https://my.metrolibrary.info/drupal/tags/mobile