Well, the K leads me to believe (as does my memory, if it serves me) that this is a KDE app, and the device (Maemo/Hildon) is built on GTK, so you'd have to install QT and it would still not look/work very smoothly.
On the other hand, if all you want is calendar, todo list, and contacts, that can sync with the desktop (the most common definition of "PIM"), that already exists and has been posted numerous times: GPE - instructions here: http://cleardefinition.com/page/Sync...d_GPE_on_N800/
http://packages.debian.org/cgi-bin/d...=arm&type=main
It is compiled for Arm and its Debian.
I would think that someone should just get this to work then we would have a PIM on the N800..