Yep, it is just available for Biztalk 2004 right now.
The installer probably wouldn’t work. But, if you took the projects and then upgraded them (just open them in Visual Studio 2005) to Biztalk 2006 it should work.
Once Biztalk 2006 goes RTM I think you will see more samples available for it.
If you do get it working on 06, let me know. I have not tried it.