For the past year, Microsoft officials have said repeatedly without offering any specifics that Office Web Apps will work on mobile phones. But now that the public beta of Office Web Apps is available (as of mid-November), the Redmondians are revealing, with a little prodding. a bit more about the companys mobile Office Web Apps plans.
Microsoft is planning two ways for customers to access Office documents from their phones: via Office Web Apps or via Office Mobile 2010. Both are currently available as free betas, but Office Web Apps only allows viewing of files, while Office Mobile allows some editing as well. The complete story contains the list of supported phones and browsers.