Zoho continues to one-up Google Docs. (Actually, they're more like four or five "up" at this point.) Zoho Sheet, the company's Web-based spreadsheet, just added over a dozen new features, including support for Visual Basic macros (the same kind used in Excel) and pivot tables/charts (which are already supported in Zoho DB).
You can see these new goodies in action in the above video. In the meantime, give Zoho Sheet a try. It's free, and arguably the best of the online spreadsheets. (Agree? Disagree? Hit the Comments, people!)