It occurred to me that Hubert Feyrer wrote in gmane.os.netbsd.advocacy:
>   This message is in MIME format.  The first part should be readable text,
>   while the remaining parts are likely unreadable without MIME-aware tools.
> Yuck, "no!"
> Just because you write about something doesn't give you a right to own it.
> Even if you are Wikipedia or think this is a nice thought otherwise.

Somehow, Wikipedia isn't very clear about it itself:

http://de.wikipedia.org/wiki/Wikipedia:FAQ_Rechtliches#Welche_Lizenzbestimmungen_gelten_f.C3.BCr_den_Inhalt_der_Wikipedia.3F

"Sind alle Inhalte der Wikipedia frei?

[...]

 * Bilder, die Wappen oder Logos zeigen, koennen nach dem Namensrecht, dem 
   Markenrecht oder im fall von Hoheitszeichen nach oeffentlich-rechtlichen
   Vorschriften gesondert geschuetzt sein, was zur Folge hat dass sie nicht
   beliebig gewerblich genutzt oder veraendert werden koennen"


Rough translation:

"Are all contents of Wikipedia free?
[...]
 * Images, showing signs or logos, can be protected under [various usage 
   rights, including trademark], which means that they cannot be used nor 
   modified for commercial use at will"