The reason we launched a hosted product first is to get around the chicken and egg problem you describe. You can create a workbook and just share a link with a

The reason we launched a hosted product first is to get around the chicken and egg problem you describe. You can create a workbook and just share a link with a colleague - they don't have to install anything. If you turn on link-sharing under the workbook's "Share" menu, they don't need an account either. The cloud also provides some powerful performance advantages.