Due to an unforeseen issue the ADO.NET Data Services Update for the .NET Framework 3.5 SP1 is not currently available for download. The team is working on a fix for the issue and will make a new version of this update available as soon as possible. We apologize for any inconvenience.

Note: The issue only affects Data Services that implement the IDataServiceHost interface; the issue involves an inadvertent change to the interface’s signature in the update. The issue causes affected services to fail during initialization.

In the meantime, the latest CTP Download is available here: http://www.microsoft.com/downloads/details.aspx?FamilyID=a71060eb-454e-4475-81a6-e9552b1034fc&displaylang=en

For more information see the Data Services team blog: http://blogs.msdn.com/astoriateam/archive/2009/12/18/update-on-the-data-services-update-for-the-net-3-5-sp1.aspx