The details came in an "important service message" sent to users by Apple on Monday. The changes require users run the latest version of iWork, 9.0.5, released last week.
With the update, users can play back Keynote '09 presentations on the Web, complete with animations, video, hyperlinks and audio. A Keynote presentation can be played using the latest version of Safari on a Mac or PC, as well as the iPhone, iPad and iPod touch.
Users can also upload documents for private online storage and easy access from anywhere, or share documents on social networks with a public link. Presentations can also be embedded on a website or blog using an embed code provided by iWork.com
The iWork.com service launched in early 2009, offering a Web-based way to use Apple's productivity suite. And last year, Apple further expanded the iWork suite to the iPad.
Apple was expected to release an updated version of the software, iWork '11, along with the launch of the new Mac App Store earlier this month. Though a new version did not materialize, promotional material in the digital download store refers to the "amazing new iWork," even though the last update arrived two years ago.