Windows Server Code Name Longhorn is schedueled for release to beta testers sometime later today, with some of the most important changes coming to Longhorn Server Core. Core will support a grand total of 8 roles, double the 4 roles it had back in mid 2005. The grand total of roles available to Server Core includes:

• Active Directory
• Active Directory Lightweight Directory Services
• DNS
• DHCP
• File/Print
• Windows Media Services
• Terminal Services Easy Print, Remote App, and Gateway
• Virtualization (configuring a server as a dedicated host for virtual servers.) (won't be available immediately)

PowerShell is also included in the 3rd beta release of Longhorn Server, as well as the Windows Firewall being enabled by default.