Here comes Google Spreadsheet
The news is out there that Google Spreadsheet is coming out soon (they say that it will be put out to limited public testing on 6th June, US Time). The link http://spreadsheet.google.com/ gives us a "Not found" error, so probably it might the URL that new service will be located.
The service will support a row of features including import and export of spreadsheets in .xls and .csv format. It is said that it will be made available on Google Labs page.
Below are some links where Google Spreadsheet is mentioned: -
News.com.com
Techmeme
If you have any more links to add, please do so in the comments area.