But there is a caveat for each of the 72 companies presenting these technology wares at the influential industry confab: They get six minutes on stage to demonstrate their new product or technology. No Powerpoint or Flash is allowed; show organizers feel the product should speak for itself. Or, as it says in the conference welcome page, presenters have six minutes to "innovate or die"

There is also a rule, adhered to by DEMO and the newer Techcrunch 50 conference also happening this week in San Francisco, that companies can only show a product or significant upgrade that hasn't been shown publicly or released anywhere else prior to the event.

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