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Preezo, which launches in public beta today, is one of a number of online presentation creators. In other words: PowerPoint on the web.
The ajaxy creator lets you create slideshows in a desktop-like environment, saving within your account and publishing for others to see. You can also email your show to others or embed it in your website. Other features include themes, transitions and import and export of PowerPoint files. Next, they plan to add collaborative tools for multiple users to work together on presentations.