Spread that sheet: Get your team members anywhere in the world work together on the same spreadsheet. Many companies have found this collaborative work flow a big money and time saver.

Pull it from the Web: Google Spreadsheets features some unique functions that help you pull data directly from the web. Not to forget the  tons of built-in functions for all the standard finance, statistics, mathematical and database needs you'd expect. 

Analysis it: Drill down. Google Spreadsheets includes powerful data analysis tools such as pivot tables, filters, data validation and solver.

Plot ‘em and chart ‘em: Creation of standard charts like line graphs, scatter plots, pie charts, bar charts and more made easy. Also, capture data in unique dynamic chart types like timeline charts, motion charts and more. 

Map it: If your data is most meaningful if it's visualized, then you can import it to a map using Google Spreadsheets.

Photo used under Creative Commons from Pascal Bovet