You can download the most current binaries from http://koffice.kde.org/
or from one of many mirror sites. The current list of mirror
sites can be found at http://www.kde.org/mirrors.html
Note
It is important that you find a binary package that is compatable
with your system. If you are unable to find it here, you may be able to
obtain a pre-compiled binary from the website of your
distribution.