We have added a few new modules to our site recently. Two of these are the StumbleThis module and the DiggThis module. Drupal already had a DiggThis module available for download but there was no StumbleThis module. StumbleUpon has been a popular source of traffic for zyxware.com and we wanted users to have an option to add any of our pages to their StumbleUpon favorites. So we created our own StumbleUpon module.