why don't use an alternate kde default icon set for to distinguish sabayon distro from the others? for the propouse the works of manatthan's buff icon set will look great with sabayon... plus he don't want everyone ask for the permission in use in noncommercial derivatives just credit him for his work:
Buuf is released under the Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License. That means you don't have to ask permission to make non-commercial derivatives!. Just make sure you give me credit.
In the sabayon distro i found also a cool font called "chicken scratch" this one
maybe could be use as subtitle under "sabayon" logo.. actually i'm using it as clock