Getting the tablet to work in Karmic is a little bit more work. Most steps are the same, but the actual installation requires more than just copying the kernel module: you also need a new fdi file for hal and you need a new Xorg driver. For completeness, there are all the commands you need to execute.
First, install some compiling tools and header files:
sudo apt-get install build-essential libx11-dev libxi-dev x11proto-input-dev xserver-xorg-dev tk8.4-dev tcl8.4-dev libncurses5-dev
Next, download the latest linuxwacom driver (0.8.6 at the moment of writing):
Now unpack, configure compile and install it:
tar -xf linuxwacom-0.8.6.tar.bz2
# I know 2.6.30 is the wrong number, but it's the highest available and it works just fine
sudo cp src/2.6.30/wacom.ko /lib/modules/`uname -r`/kernel/drivers/input/tablet/
sudo cp src/util/10-linuxwacom.fdi /usr/share/hal/fdi/policy/20thirdparty/10-linuxwacom.fdi
sudo cp src/xdrv/wacom_drv.so /usr/lib/xorg/modules/input/wacom_drv.so
Now restart hal, reload the wacom module and plug in your tablet:
sudo /etc/init.d/hal restart
sudo rmmod wacom
sudo modprobe wacom
The tablet should work now. You can also add the module name to /etc/modules to automatically load it on boot. Same issues as in the previous post apply to Karmic, but for me this works good enough.