So the hero's over at the Arch website had already flagged the fact that the upgrade to KDE SC 4.4 was not going to be a simple pacman -Syu. In fact I found I had to jump through a couple more hopes than those listed in their post (above) and so thought I would share how I got to -Syu to KDE SC 4.4.
The following commands should be run as root (or sudo if you have it installed):
$ pacman -Sy --asdeps qt
$ pacman -Su
$ pacman -Sy kdepim-runtime
$ pacman -Sy kdepimlibs
$ pacman -Syu
That got my upgrade underway. Hopefully this might help others. If you are still stuck let me know the errors you are experiencing and I will try and provide some help.