How can I implement an application like Prezi.com flash prezentation editor?

I really like the zooming process in Prezi.com flashs app.

I didn't find any documentation on how to implement the prezi app.

Maybe some of you knows how 开发者_JS百科to design or implement the final zoom by trajectory in application.

Finally I want to use that in a website to create a more interactive content prezentation of the company website to the user.

Thanks.

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zooming process is a number of parallel motion tweens for x, y and (imho) a custom parameter scale of the presentation, which itself seems to be a kind of resource holder that hides or shows content according to x, y and scale values