Description of problem:
Was already reported in the expired bug #177301, but here it goes again...

$ sudo yum install system-config-keyboard
[...]
Installing:
 system-config-keyboard                             x86_64                        1.3.1-9.fc18                         rawhide                         30 k
Installing for dependencies:
 system-config-keyboard-base  

$ system-config-keyboard 
You are attempting to run "system-config-keyboard" which requires administrative
privileges, but more information is needed in order to do so.
Authenticating as "sandro"
Password: 
Traceback (most recent call last):
  File "/usr/share/system-config-keyboard/system-config-keyboard.py", line 79, in <module>
    useTextMode()
  File "/usr/share/system-config-keyboard/system-config-keyboard.py", line 35, in useTextMode
    import keyboard_tui
  File "/usr/share/system-config-keyboard/keyboard_tui.py", line 30, in <module>
    from snack import *
ImportError: No module named snack

$ yum provides *snack*
[...]
newt-python-0.52.14-3.fc18.x86_64 : Python bindings for newt
Repo        : rawhide
Matched from:
Filename    : /usr/lib64/python2.7/site-packages/snack.pyc
Provides    : _snackmodule.so()(64bit)
Filename    : /usr/lib64/python2.7/site-packages/_snackmodule.so
Filename    : /usr/lib64/python2.7/site-packages/snack.pyo
Filename    : /usr/lib64/python2.7/site-packages/snack.py