The first time you think about it, the idea of doing online collaborative spreadsheets in the style of a wiki may sound stupid--especially if you don't like jargon. Then ask yourself if you've ever had issues sharing an Excel document. If you answered yes, as 90 percent of you will, then WikiCalc is not so stupid after all. It was created by Dan Bricklin, the man who brought us VisiCalc long before the days of Excel. You can still get VisiCalc as a 28K download. That's smaller than the page you're looking at right now.