It seems that there is a lack of interest in technology demos and Google wants everybody to participate, so anyone can make a tech demo and showcase it in the website. When you go to Demo Slam you will find the button Show the world what you can do, where you will find some instruction and guide lines on how to upload your tech demo and show it off in Demo Slam. Here is a tech demo from the Paul brothers play Chubby Bunny with Google Search by Voice for their Demo Slam.
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