If you are looking for Windows Server AppFabric Distributed Cache Client for Windows Server 2003 at http://go.microsoft.com/fwlink/?LinkId=193370 the link is currently broken The correct location is Windows Server AppFabric - Windows Server 2003 Distributed
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Read the complete post at http://blogs.iis.net/appfabric/archive/2010/06/21/windows-server-appfabric-windows-server-2003-distributed-cache-client.aspx