Below are some screenshots taken from regular Webmin, accessed with KDE's Konqueror browser (as it can be easily automated).
The list of Unx users from the Users and Groups module
Creating a Unix user in the same module
Listing mounted filesystems on Linux
Managing NFS exports on a Linux system
Editing disk quotas for a Unix user
Viewing local disk partitions on Linux
Editing a system bootup script which starts Apache
Viewing running processes
Viewing the details of an installed RPM package
Managing system log files
Editing the details of a network interface
Adding a Linux firewall rule
Setting the system time and timezone
Adding a new printer using CUPS
Listing installed Perl modules
Setting up disk space monitoring
Editing the configuration of an Apache virtual host
Managing records in the DNS domain
Configuring a DHCP server
Creating a new Majordomo mailing list
Managing tables in a MySQL database
Managing databases in a PostgreSQL server
Viewing Sendmail email aliases
Configuring an SSH server
Sharing a new directory to Windows clients with Samba
Configuring network settings for the Squid proxy server
Creating a new Procmail email filtering rule
Webmin configuring itself!
Creating an extra Webmin login with limited permissions
Setting up a scheduled backup
Configuring a system to talk to an LDAP server
Managing users in an LDAP database