ARTINFO's Julia Halperin has a piece on the meaning of the Jenack decision which quotes from this post last week.
UPDATE: Some thoughts from the Art Market Monitor.
UPDATE 2: More from Nicholas O'Donnell: "The decision does not say that an auction house has to disclose the seller as a matter of course. To the extent that reports have simplified it in that way, the criticism is correct, and a welcome clarification."