For those of you that have a TechNet online subscription, the download center now has the latest build of Windows Server 2008.  IDS-3 or also known as the June CTP, has a bunch of fixes checked in, new admin password behavior, and some other stuff in server core I'll let you discover.  Here's the description from the download center area:

Microsoft Windows Server 2008 IDS-3 helps IT professionals to increase the flexibility of their server infrastructure while offering developers a more robust Web and applications platform for building connected applications and services. Powerful new management tools and security enhancements offer more control over your servers and network and provide advanced protection for your applications and data.

Windows Server 2008 IDS-3 Standard Edition
This edition of Windows Server 2008 IDS-3 provides key server functionality across most server roles and features. It includes both full and Server Core installation options.

Windows Server 2008 IDS-3 Enterprise Edition
This edition builds on Windows Server 2008 IDS-3 Standard Edition to provide greater scalability and availability, and adds enterprise technologies such as failover clustering and Active Directory Federation Services.

Windows Server 2008 IDS-3 Datacenter Edition
This edition offers the same functionality as Windows Server 2008 IDS-3 Enterprise Edition with support for additional memory and processors, and unlimited virtual image use rights.