xorg.conf:

Section "InputDevice"
        Driver          "wacom"
        Identifier      "stylus"
        Option          "Device"         "/dev/input/wacom"
        Option          "Type"           "stylus"
        Option          "USB"            "on"
EndSection

Section "InputDevice"
        Driver "wacom"
        Identifier "eraser"
        Option "device"         "/dev/input/wacom"
        Option "type"           "eraser"
        Option "USB"            "on"
EndSection

Section "InputDevice"
        Driver "wacom"
        Identifier "cursor"
        Option "device"         "/dev/input/wacom"
        Option "type"           "cursor"
        Option "USB"            "on"
EndSection

Section "InputDevice"
        Driver "wacom"
        Identifier "pad"
        Option "device"         "/dev/input/wacom"
        Option "type"           "pad"
        Option "USB"            "on"
EndSection

--------------------------------------------------

# ls -l /dev/input
total 0
drwxr-xr-x 2 root root     100 2006-10-29 10:34 by-id
drwxr-xr-x 2 root root     140 2006-10-29 10:34 by-path
crw-rw---- 1 root root 13,  64 2006-10-07 15:25 event0
crw-rw---- 1 root root 13,  65 2006-10-07 15:25 event1
crw-rw---- 1 root root 13,  66 2006-10-07 15:25 event2
crw-rw---- 1 root root 13,  67 2006-10-29 10:34 event3
crw-rw---- 1 root root 13,  63 2006-10-07 15:25 mice
crw-rw---- 1 root root 13,  32 2006-10-07 15:25 mouse0
crw-rw---- 1 root root 13,  33 2006-10-29 10:34 mouse1
lrwxrwxrwx 1 root root       6 2006-10-29 10:34 tablet-graphire4-4x5 -> event3
crw-rw---- 1 root root 13, 128 2006-10-07 15:25 ts0
crw-rw---- 1 root root 13, 129 2006-10-29 10:34 ts1
lrwxrwxrwx 1 root root       6 2006-10-29 10:34 wacom -> event3

--------------------------------------------------

# lsusb
Bus 002 Device 001: ID 0000:0000
Bus 003 Device 003: ID 056a:0015 Wacom Co., Ltd
Bus 003 Device 002: ID 045e:0024 Microsoft Corp. Trackball Explorer
Bus 003 Device 001: ID 0000:0000
Bus 001 Device 003: ID 05e3:0710 Genesys Logic, Inc. USB 2.0 33-in-1 Card Reader
Bus 001 Device 001: ID 0000:0000

--------------------------------------------------

# dmesg | grep -i wacom
input: Wacom Graphire4 4x5 as /class/input/input3
usbcore: registered new driver wacom
drivers/usb/input/wacom.c: v1.45:USB Wacom Graphire and Wacom Intuos tablet driver