Howtoforge published a guide about setting up ISPConfig 3 on Ubuntu 8.10

This tutorial shows how to prepare an Ubuntu 8.10 server for the installation of ISPConfig 3, and how to install ISPConfig 3. ISPConfig 3 is a webhosting control panel that allows you to configure the following services through a web browser: Apache web server, Postfix mail server, MySQL, MyDNS nameserver, PureFTPd, SpamAssassin, ClamAV, and many more.

The Perfect Server - Ubuntu 8.10 ISPConfig 3