There is an 8 part screencast series on Keith Combs' Blahg blog. The short videos starts with a technical overview and goes through different aspects of Microsoft's Windows Server Core 2008. Check it out.

Part 1 - Core Technical Overview (6:00)Part 2 - Core WSv Prerequisites (7:37)Part 3 - Core Networking (6:37)Part 4 - Core Activation (5:38)Part 5 - Domain Join (2:37)Part 6 - Core Role Installatio