KOffice 2 Beta 3 has been released. Packages are available for Kubuntu Intrepid in the intrepid-backports archive.
Please note that these packages will only work with Kubuntu Intrepid Ibex, the latest release of Kubuntu.
Follow the Kubuntu Repository Guide and tick Unsupported Updates
You can now update any existing KOffice 2 installation to the most recent version using the Adept Updater tool in your system tray.
Please follow the Adept How to and install the package called "koffice-kde4", if you don't have KOffice 2 installed yet.
Now you should be able to start the KOffice 2 applications from the menu. For example the word processing application KWord.