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About a month ago, we announced that Excel Web App and the Office Web Apps are destined to become a comprehensive productivity experience on more browsers and devices (not just companions to the desktop applications). We didn't give any specific timelines as part of that, but last week we released our first feature update since that announcement. Head over to the Excel Blog to see some of the awesome new things you can do in Excel Web App now in both SkyDrive and Office365, and you'll also get a peak at some of what we've got coming in future updates!
Read more in the Excel Blog!