The first demo of Gears will be for Google Reader, but more Google apps are expected to come. Reader will add a green download button to the user interface. When you click the button, Reader will download the last 2,000 messages to your computer, preparing your computer to work offline or under a spotty internet connection.
Google is releasing opensource and early to developers to get some preliminary feedback. They are also collaborating with a host of other partners such as Opera, Mozilla, and Adobe, which will to integrate flash and Apollo into their system.
Robert Scoble (coverage) and Artur Bergman (coverage) were also at the press event.