Google Docs and SpreadSheet are support charts features now. Seem like Nearly every types of chart are included from pie charts to bar graphs. The Google chart features is easy to use. Just highlight cells you want to analyze and click on little pie-chart button on toolbar. You even can export the charts to PNG images.

Beside that charts features, Google spreadsheet also introduced new features like range names and comment. On range names features,, you can define a name for a range of cells, and use range name in formulas to refer to cells. Example write =sum(expenses) instead of =sum(c12:e17). This features helps make calculation logic clearer to write and understand. Meanwhile, Comments features allow you leave comment on any spreadsheet cell.

Currently the google chart features supported in Firefox and Internet Explorer without the need for a plug-in. But Opera browser is not officially supported.