Spreadsheet gadgets let you visualize your data in interesting, intuitive ways. For example, you can see addresses on an interactive map, or create dynamic time series charts that let you zoom in and scroll through a graph.
Revision notifications let you set up alerts so you know when someone makes changes to a spreadsheet.
Other new features include the ability to select cells for formulas with arrow keys, an expanded color palette, text auto-complete from other cells in the same column, a new function auto-complete feature, and new sort(), filter() and unique() functions.
Standard, Premier, Education, Team and Partner Editions
How to access what's new:
Sign in to Google Docs, open a spreadsheet, and click the 'Add' button in the toolbar. (The icon looks like a bar chart.) Then select "Gadget..." to see all the gadget options.