This is the first of a three slide tour. In this example of formatting, Google shows you how to set up a Little League baseball schedule. This is probably much closer to what Google intends rather than taking on a full blown Microsoft Excel application.
Google Spreadsheets - Google Spreadsheets tour - 2
In this slide, Google is showing off their communication and collaboration strength. A chat takes place while in the spreadsheet application while you can invite people to view only or also edit the spreadsheet.
Google Spreadsheets - Google Spreadsheets tour - 3
Saving and download options include the Microsoft .xls format and the comma delimited formats.
Google Spreadsheets - Why would I want to use Google Spreadsheets?
Googles reasons for using its spreadsheet includes: instant availability, real time collaboration, access, secure online storage and a desktop familiar to spreadsheet users.
Google Spreadsheets - How many people can I share a spreadsheet with?
Google claims its spreadsheets have no limit on the number of users who can access.
Google Spreadsheets - What measures is Google taking to protect the privacy & security of people\s spreadsheets?
Googles spreadsheet security
Google Spreadsheets - What are the key features of Google Spreadsheets?
Googles spreadsheet key features
Google Spreadsheets - What information does Google Spreadsheets collect about users?
Google explains what information it is collecting.
Google Spreadsheets - How do I import an existing Excel file?
Google explains how to import Excel .xls files
Google Spreadsheets - How many spreadsheets can I create?
Googles current limits on file size, rows and columns
Google Spreadsheets - Basic information
Googles help center provides basic spreadsheet information.
Google Spreadsheets - Help Center
Googles privacy and security information addresses the question of can you catch viruses that might have been in Microsoft Excel files. Google claims the answer is no.
Google Spreadsheets - How do I export to Excel?
Google explains how to export a Google spreadsheet file to Excel.
Google Spreadsheets - What browsers are supported?
Googles list of supported browsers