Sometimes there are things that I'm missing and this is one of them... today I've decided to install on my notebook the last November 2006 CTP of the Visual Studio 2005 extensions for .NET Framework 3.0 (WCF & WPF), but after downloading the package I've read more carefully the website and a news appeared me:
"This is the last release of this technology that will be in the form of a set of extensions for Visual Studio 2005. Any new technology in this space will be included in CTPs of the next full version of Visual Studio which is currently code named “Orcas”.".
Looks like this is the last chance to have tools for working with .NET 3.0 on Visual Studio 2005... 
I was waiting for a big improvement of "Cyder" before Orcas, but seems that it will not be so...