Think Secret reported this morning that they believe iWork '07 will come bundled with a new spreadsheet application.
The application has been rumoured for years and has been known to be in development under the name Lasso, Think Secret doesn't know what the final name of the application will be but claims that it will pack more than 200 functions.
Sources to Think Secret say that the final application could differ considerably to the posted screenshot.
World of Apple recently noted that the name Numbers is no longer and trademark of Apple and Charts has never been trademarked by the company.