Links: Microsoft Windows Server 2008

Windows Server 2008: System Requirements
http://www.microsoft.com/windowsserver2008/en/us/system-requirements.aspx

Windows Server 2008: Overview of Editions
http://www.microsoft.com/windowsserver2008/en/us/editions-overview.aspx

Windows Server 2008: Compare Features
http://www.microsoft.com/windowsserver2008/en/us/compare-features.aspx

Windows Server 2008: Compare Server Roles
http://www.microsoft.com/windowsserver2008/en/us/compare-roles.aspx

Links: Microsoft SQL Server 2008

MSDN: SQL Server 2008 Books Online: Product Specifications for SQL Server 2008
http://msdn.microsoft.com/en-us/library/ms143287.aspx

MSDN: SQL Server 2008 Books Online: Hardware and Software Requirements for Installing SQL Server 2008
http://msdn.microsoft.com/en-us/library/ms143506.aspx

MSDN: SQL Server 2008 Books Online: Maximum Number of Processors Supported by the Editions of SQL Server 2008
http://msdn.microsoft.com/en-us/library/ms143760.aspx

MSDN: SQL Server 2008 Books Online: SQL Server 2008 Books Online: Memory Supported by the Editions of SQL Server 2008
http://msdn.microsoft.com/en-us/library/ms143685.aspx

MSDN: SQL Server 2008 Books Online: Maximum Capacity Specifications for SQL Server 2008
http://msdn.microsoft.com/en-us/library/ms143432.aspx

MSDN: SQL Server 2008 Books Online: Editions and Components of SQL Server 2008
http://msdn.microsoft.com/en-us/library/ms144275.aspx

MSDN: SQL Server 2008 Books Online: Features Supported by the Editions of SQL Server 2008
http://msdn.microsoft.com/en-us/library/cc645993.aspx

MSDN: SQL Server 2008 Books Online: Using Upgrade Advisor to Prepare for Upgrades
http://msdn.microsoft.com/en-us/library/ms144256.aspx

MSDN: SQL Server 2008 Books Online: Getting SQL Server Assistance
http://msdn.microsoft.com/en-us/library/ms166016.aspx

MSDN: SQL Server 2008 Books Online: Planning a SQL Server Installation
http://msdn.microsoft.com/en-us/library/bb500442.aspx

MSDN: SQL Server 2008 Books Online: Overview of SQL Server Installation
http://msdn.microsoft.com/en-us/library/bb500438.aspx

MSDN: SQL Server 2008 Books Online: How to: Install SQL Server 2008 (Setup)
http://msdn.microsoft.com/en-us/library/ms143219.aspx

MSDN: SQL Server 2008 Books Online: How to: Upgrade to SQL Server 2008 (Setup)
http://msdn.microsoft.com/en-us/library/ms144267.aspx

MSDN: SQL Server 2008 Books Online: Migrating to SQL Server 2008
http://msdn.microsoft.com/en-us/library/bb677619.aspx

MSDN: SQL Server 2008 Books Online: Backward Compatibility
http://msdn.microsoft.com/en-us/library/cc280407.aspx