[Infowarrior] - Google Spreadsheets

[Richard Forno]

(...not sure I'd be comfy using this for a business or anything proprietary,
but interesting challenge to Microsoft, for sure......rf)

Creating spreadsheets

Create basic spreadsheets from scratch.
You can start from scratch and do all the basics, including changing the
number format, sorting by columns, and adding formulas.

Upload your spreadsheet files.
Upload spreadsheets or worksheets from CSV or XLS format - all your formulas
and formatting will come across intact.

Familiar desktop feel makes editing a breeze.
Just click the toolbar buttons to bold, underline, change the font, change
the cell background color and more.

http://www.google.com/googlespreadsheets/tour1.html