about kinect and demo showcase on your website
 

I want to know is that possible to download showcase on your website such as manufacturing training?

And I also want to know what kind of function Vizard can accomplish by connecting Microsoft Kinect with Vizard through FAAST? Is there possible to achieve tracking the position of hand?

Is there any demo for Kinect except for the one with 23 sphere moving body?

It depends on the version of FAAST you're using. In Vizconnect, go to the Advanced Configuration menu and from the Trackers tab select 'Add a new Tracker'. Select the Microsoft Kinect option and in the Info pane, you'll see a list of available trackers for the different versions of FAAST.