For fans of ISPConfig (http://www.ispconfig.org) who aren't already aware, version 3 is out of beta. I installed it on a test Debian Lenny VPS for test-drive purposes, and it's quite different from version 2. There's a bunch of new features to try out (integrated firewall, shell users without real system accounts, multiple server support, many other points as well), and the interface has been totally redesigned.
Please note that v3 cannot be installed on a host configured for v2. Our buddy falco has posted a new set of HOWTO docs on HowToForge that explain how to configure a system for v3. From my initial impression, it's a nice product. I still prefer version 2, but may change my mind as time goes on.