Yep it's finally available for testing as a windows port...
KOffice - Integrated Office Suite
KOffice is a free, integrated office suite for KDE, the K Desktop Environment.
May 19th, 2008 KOffice alpha Installer for Windows
May 19th, 2008: KOffice alpha Installer for Windows
An installer for KOffice alpha on Windows is now available for testing. This is one of the most visible steps to bring the KOffice suite to Windows users. The installer can be download from here , there are still some rough edges in the installer, since you will have to copy the dll file to the directory which contains the executables, more information about installing KDE applications on Windows can be found on techbase).