RE: Also, if you haven't already, you'll want to add references to the GAC'd assemblies in the machine.config's system.web\compilation\assemblies section (I think this is only necessary for .NET 1.0)...
Question: If I create version/key references in the machine.config to these assembly versions like so ... assembly="CustomPublisher, Version=1.1.0.0, Culture=neutral, PublicKeyToken=3f902dc01e5f15a6" is the point that I now don't have to put the full reference in the application's config?