Microsoft published new guide about planning and design infrastructure in Windows Server 2008.
Main subject are:

System Center Operations Manager 2007
System Center Virtual Machine Manager 2008
Internet Information Services 7.0
NAP
Microsoft SoftGrid Application Virtualization
Windows Deployment Services
Windows Server 2008 Active Directory Domain Services
Windows Server 2008 Terminal Services
Windows Server Virtualization: Hyper-V and Virtual Server 2005 R2 SP1

For Windows Server 2003 I [...]

System State is backup file included:
The System Registry
The COM+ Class Registry Database
Boot and System Files
Windows File Protection System Files
Active Directory Database (Domain Controller)
SYSVOL Directory (Domain Controller)
Certificate Services Database (Certificate Server)
Cluster Service Configuration Information (Failover Cluster)
IIS Metadirectory (Web Application Server)

Deleted object in Active Directory we can restore without making authorative restore. This is possible because deleted object are marked to delete and in 90 days are still store in AD, they are call ‘tombstoned’ objects in Active Directory.
To restore ??~tombstoned? objects You can use this tools:

Object Restore for Active Directory ? this is graphical [...]

This is very simple, find store.exe file.
Click right mouse button on file store.exe and choose ??oPropertise???
Click ??oVersion??? and for ??oOther version information??? choose ??oComments???
For Exchange Server 2003 default installation is in folder C:\Program Files\Exchsrvr\bin

For Exchange Server 2007 default installation is in folder C:\Program Files\Microsoft\Exchange Server\bin