Darn, I actually forgot the Power On / Off Key in my table. Here is my working
corrected table, where I defined Power On / Off as XF86Sleep and XF86PowerDown.

partial alphanumeric_keys
xkb_symbols "cymotionlinux" {
    name[Group1]= "Cherry CyMotion Master Linux";

    key <FK17>  {       [ XF86Search            ]       };
    key <XFER>  {       [ XF86AudioMedia        ]       };
    key <I02>   {       [ XF86HomePage          ]       };
    key <I05>   {       [ Redo                  ]       };
    key <I0F>   {       [ Undo                  ]       };
    key <I10>   {       [ XF86AudioPrev         ]       };
    key <I17>   {       [ XF86Launch1           ]       };
    key <I19>   {       [ XF86AudioNext         ]       };
    key <I1F>   {       [ XF86Launch0           ]       };
    key <I20>   {       [ XF86AudioMute         ]       };
    key <I21>   {       [ XF86Calculator        ]       };
    key <I22>   {       [ XF86AudioPlay, XF86AudioPause ] };
    key <I24>   {       [ XF86AudioStop         ]       };
    key <I28>   {       [ Multi_key             ]       };
    key <I2B>   {       [ XF86Launch2           ]       };
    key <I2E>   {       [ XF86AudioLowerVolume  ]       };
    key <I30>   {       [ XF86AudioRaiseVolume  ]       };
    key <I47>   {       [ XF86PowerOff          ]       };
    key <K6C>   {       [ XF86Eject             ]       };
    key <I67>   {       [ XF86Reload            ]       };
    key <I68>   {       [ XF86Stop              ]       };
    key <I69>   {       [ XF86Forward           ]       };
    key <I6A>   {       [ XF86Back              ]       };
    key <I6C>   {       [ XF86Mail              ]       };
    key <K75>   {       [ XF86ScrollUp          ]       };
    key <I0F>   {       [ XF86ScrollDown        ]       };
    key <I3C>   {       [ XF86Cut               ]       };
    key <K65>   {       [ XF86Paste             ]       };
    key <I78>   {       [ XF86Copy              ]       };
    key <K68>	{	[ XF86Sleep             ]	};
    key <I63>	{	[ XF86PowerDown         ]	};
};

Sorry about the phenomenal bug spam, guys.  Adding xorg-team@ to the QA contact so bugs don't get lost in future.

Andreas, I changed essential keys. Could you please check? The sequence of launch keys in the current version starts from 1 (not from 0, as in your version). I think it is ok. Also, XF86WWW is used instead of XF86HomePage. I hope it is not a major issue for you.

Your changes are prolly ok. I will test it next monday, because I am using the keyboard only at work.

(In reply to comment #3)
> Andreas, I changed essential keys. Could you please check? The sequence of
> launch keys in the current version starts from 1 (not from 0, as in your
> version). I think it is ok. Also, XF86WWW is used instead of XF86HomePage. I
> hope it is not a major issue for you.

Have you checked this in, somewhere? Sounds ok for me but for testing I need a checked in version or a pointer to the changes. 

Yes I checked it in. The CVS is on fd.o. For details, see here:

http://www.freedesktop.org/wiki/Software/XKeyboardConfig/Development

Ok, first to clarify what I did: I recompiled xkeyboard-config from HEAD and then recompiled my xorg-server which is currently at 1.3.0.0 (just to be sure).
I've noticed the following:
1) The "ON" Key does not work. The XF86Standby key is working. When I press the "ON" key within xev, I get: 
KeyPress event, serial 32, synthetic NO, window 0x3600001,
    root 0xa3, subw 0x0, time 335764427, (164,-16), root:(1101,134),
    state 0x10, keycode 199 (keysym 0x0, NoSymbol), same_screen YES,
    XLookupString gives 0 bytes:
    XmbLookupString gives 0 bytes:
    XFilterEvent returns: False
2) The keys for XF86ScrollUp and XF86ScrollDown have alternate symbols for XF86ScrollRight and XF86ScrollLeft, but I am not able to activate those symbols.

The rest of the keys seems to work pretty well. Good job mate!

> 1) The "ON" Key does not work. The XF86Standby key is working. When I press the
> "ON" key within xev, I get: 
> KeyPress event, serial 32, synthetic NO, window 0x3600001,
>     root 0xa3, subw 0x0, time 335764427, (164,-16), root:(1101,134),
>     state 0x10, keycode 199 (keysym 0x0, NoSymbol), same_screen YES,
>     XLookupString gives 0 bytes:
>     XmbLookupString gives 0 bytes:
>     XFilterEvent returns: False
OK, I'll add <K68> mapping

> 2) The keys for XF86ScrollUp and XF86ScrollDown have alternate symbols for
> XF86ScrollRight and XF86ScrollLeft, but I am not able to activate those
> symbols.
Sorry, I do not see these alternate symbols in your mapping.

Andreas confirmed it is fixed