WSS SP 2 improvements

The Windows SharePoint Services (WSS) SP 2 release has substantial improvements including:

* Support for running on 64-bit machines in 32-bit emulation mode
* Support for Reverse Proxy and Alternate URL support
* Support for IP Bound virtual servers
* Support for off-box SSL termination
* Support for SQL Server 2005
* Support for ASP.NET 2.0

You can get specific information about this update in the Microsoft Knowledge Base article (887624): Description of Windows SharePoint Services Service Pack 2.

Download at source: Windows SharePoint Services Service Pack 2 (SP2)