AjaxXLS. Another in the Ajax family of stuff. This time an online Microsoft Excel viewer which aims to be an easier option than downloading the official MS viewer for Excel spreadsheets. Worth a bookmark, I suppose, although it still feels rather crude and beta.
With one click you can easily open any .xls file in just a few seconds. The interactivity and responsiveness provided by AJAX programming allows you to enjoy the power and utility of a spreadsheet without the cost of conventional software.