I just found out about this from Rutra via site mail(thanks Artur!).First of all,thanks Kanzler for letting us know about this,I for one,did not authorize the use of my images,nor was I asked to do so!I checked out the site,and while I am pissed,I must say I'm honoured to have been included among such company.I checked out the link Red Dog suggested,but with it all in German I honestly don't know where to file my request to remove my images...if anyone can help I would  appreciate it.
Secondly,while I can understand Renderosity's stand on this,I'm a little disappointed in the response...no wait,I'm more than a little disappointed!I think that at the very least a cease and desist request from this site to theirs on all of our behalf would be in order,and I don't think it's too much to ask!We have a symbiotic relationship here...we look good thanks to Renderosity,and our art helps make the site what it is...which is what drew me to become a member here.I know that this sort of thing is happening,and has the potential to happen,all the time,and I know in reality there's little to be done to stop it...but I for one would like to know my best interests were in the minds of those whose site I am a member of.So I leave it at that,and maybe if enough of those whose works were stolen voice a similar opinion a request would be sent.Should a joint venture to pursue this any further come about,my name can be added to the list!