It took a bit of time due to the holidays, but KOffice 2.3.0 is finally available from Debian experimental (give some hours to your mirror to sync!). If you are unstable user don't be afraid to fetch it from experimental, it is there only because the Squeeze freeze. Squeeze will ship with KOffice 2.2.1, while not all the applications are so polished as it would be desirable, it clearly offers huge improvements over old KOffice 1.6.3.

I do not know if there will be a KOffice 2.3.1 upload but I know for sure the future is with Calligra :)