Autodesk have posted a new build (20080101_2345) of Revit Architecture 2008, Revit Structure 2008, and Revit MEP 2008. It is still considered Web Update #3 because replacing the existing file was the fastest method of delivering it to the public.
Therefore, the executable file names are the same as the previous build (20071102_2345).
Here are the links to the updated downloads...
16 hours ago