Worksheet-Server: Run and Consolidate your Spreadsheets over the Web (Excel, OpenOffice, Lotus, Star Office): Now this is something to behold. Build a spreadsheet with all the business formulas and logic you need, then upload it to this server it will be converted to a Web app.
Check out the demo page to really appreciate the power this gives you.
The Worksheet-Server combines the flexibility of Microsoft Excel with the power of todays Web technology. Simply define the desired business logic in Excel Spreadsheets and let the Worksheet-Server run these applications independently from Microsoft Excel as a true PHP-based Multi-User Web application.
I can’t figure out if you can buy this, or if it’s a service only.