We particularly liked the ease of use of Keynote's chart and table tools, which work within the application, and its transition effects, both for moving between slides and for introducing elements within an individual slide--though overuse may eventually make us as tired of Keynote's revolving cube transitions as we are of PowerPoint's wipes.

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These include a weather and stocks application and a photo enhancer that enables special effects to be applied before sharing photos with friends.

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The overriding lesson is clear: in this age of increasing web application complexity, know the external services upon which your site depends and have plans in place to mute the inevitable ripple effects that will occur.

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