The current version of Numbers is 3.0. The update is available for those using Number 2.3, iWork '09. Even if it were possible to update iWork '08 to the new versions, you would have many, many problems. The new versions cannot open any iWork '08 or earlier documents or templates. You will get an error saying to open the files in iWork '09 then open them in the new version. I suggest you buy the retail box of iWork '09 from a third party such as Amazon.com or eBay. Be sure to run Software Update after installing & before running any of the applications. You can also download the standalone updater from this page. You could then update to the new iWork apps in the Mac App Store. You might check this link for the iWork '09 trial. I have no idea if it is still available.