As mentioned before, Carla del Ponte wrote in her book the accusation that kidnapped Serbs from Kosovo had been transported to Albania where they had been killed and their organs sold.
Now the Spiegel has gone to Albania to have a look for themselves. They describe the house in Rribe near Burrel (and show a picture) and talked to the owner and his children. The family denied everything and complained that they had had to sleep outside for two nights (in februari!!) when Del Ponte came investigating. The Spiegel notes some inconsistencies in their story. But they also note that the witnesses from 2004 have disappeared and that at that time nothing had been done to safeguard evidence.
It should be noted that organ trade is nothing new to Albania: see these reports. So if Serbs were transported to Albania for using their organs there would be networks ready to "process" them. Very probably those networks are still there and connected at a very high level in Albania's establishment.
Postscript (6 nov 2008): Several media report that two Kosovar doctors have been arrested for organ trade. The name of the doctors had also been mentioned in the case of the abducted Serbs.
Postscript (15 nov 2008): B92 is doing some investigations now. There are also investigations for Serb patients from a Kosovo psychiatric hospial who went missing and the story that UNMIK will investigate the Burrell house.
Postscript (25 nov 2008): The Guardian went to the Burrel house with a camera. The article shows a 3 minute interview with the Katuci familt who lives in the house.