The Major Linux Distributions Red Hat Commercial Linux has a local mirror at Uni of NSW and AARNet . Debian has a web page and an Australian mirror site . Linux - Mandrake is an implementation of RedHat with some modifications, including KDE .
Caldera have a with lots of useful information.
Also e-smith which is designed to be an easy to use server installation. The Linux Standards Association is developing cross-distribution standards. These are typically Linux distributions that boot off one or two floppy disks, and are designed for system recovery. BYLD allows custom recovery disks. I've had limited success with it.