I've just followed the Ubuntu Perfect 6.10 server setup, and installed ISPConfig and got that working. I can't seem to find phpmyadmin.... maybe I missed the install steps somewhere? What needs to be done to install phpmyadmin and get ISPConfig to take advantage of it?
You will find the phpmyadmin .pkg here: http://www.ispconfig.org/downloads.htm it can be installed with the ISPconfig software update function.