Kernel 2.6.x series seem to have fairly recent Wacom drivers. I downloaded the most recent stable driver (0.6.3 as of July 2004) from LinuxWacom anyway. The LinuxWacom site has extremely long and fairly clear instructions. Unfortunately, the instructions are slightly different for 2.4.x and 2.6.x series kernels, which sometimes confused me.
I executed `./configure' with various options (such as -enable-wacom, -enable-hid, -enable-evdev, -enable-mousedev, -enable-usbmouse and probabl -enable-input). `./configure' complained that my `hid' was already up-to-date, and did not need to be changed. I then executed make, which actually places the source code and generated executables straight into the kernel source tree (and re-compiles the kernel). The LinuxWacom source defaults to using `/usr/src/kernel', unless told to use another kernel source tree using `-with-kernel=/usr/src/linux-2.6.5-xxx'.
It might not have needed to download the LinuxWacom package at all. The LinuxWacom package requires the user to re-compile the kernel, whcih could be quite intimidating. Even I chose not to re-compile the wacom_drv.o, which would have required me to install XFree86 sources and re-compile it.