For the release of Kubuntu 12.10 we are thinking about switching to a different instant messaging framework named Telepathy.
With KDE Telepathy 0.4 we now have a viable testing candiate for you to try on your existing 12.04 installation.
Packages for the release of the Calligra Suite 2.5 Release Candidate are available for Kubuntu 12.04. You can get it from the Kubuntu Beta Backports PPA (which also contains an update to the KDE SC 4.9 beta). They are also in our development release.