WPF Development with Visual Studio 2005
Apparently the November 2006 CTP extensions for Visual Studio 2005 will be the last release will be the last of the WPF development tools that target Visual Studio 2005; but it has been updated to support the released version of .NET 3.0 so I suppose it's about as safe of an install as you can get considering. (Future releases will be done as part of "Orcas" CTP releases.)
I'm adding the direct links to download the necessary tools here for my future reference.
Microsoft Windows Software Development Kit for Windows Vista and .NET Framework 3.0 Runtime Components
Visual Studio 2005 extensions for .NET Framework 3.0 (WCF & WPF), November 2006 CTP