UPDATE$ Dec. 14: Sotheby's has withdrawn the Mahfouz collection from sale.
Following up on my long interview with Raymond Stock on translating Naguib Mahfouz for his centenary, Al-Masry Al-Youm has a useful piece on the trials and difficulties of translating Mahfouz.
Also, Arabic Literature (in English) discusses speculation about the provenance of some Mahfouz materials up for auction at Sotheby's; who is the seller, said to be a North American collector, of this cache of archives not previously known to Mahfouz scholars?
Both articles are worth reading. Also see Ursula Lindsey's memories at The Arabist.
Later: Raymond has also given a new interview to Arabic Literature (in English.) He seems to identify the seller in the Sotheby's auction.