There are two episodes available now; "Setup and Administration" and "Managing Your Server." Each features a screencast walk-through of some basic tasks, as well as as a monotone and articulate host in the standard issue black mock turtleneck.
Seasoned Mac OS X Server administrators will find the content pretty basic, but still enjoyable. If you're considering Leopard Server for your work group or small business, these videos are a nice introduction. When you're ready to join the ranks of Mac OS X Server pros, swing by afp548.com and macenterprise.org for additional webcasts and training resources.