Bloomberg has an excellent 'story so far' and analysis of all the issues involved in the various museums' actions in what we have dubbed collectively 'the Museum Case' (i.e. the Met's recent decision, the Getty/True thing, Italian/Greece cooperation on antiquities recovery, etc.) ... here's the incipit, but it is worth reading the whole thing:

On Nov. 22, Philippe de Montebello, the director of New York's Metropolitan Museum of Art, walked up a cobblestone street in Rome and into a palazzo connected to the chambers where Galileo faced the Inquisition 372 years earlier.

Inside the Italian Culture Ministry's headquarters, curators, police and the minister of culture himself showed evidence to the chief of the Western Hemisphere's biggest art museum that the Met harbored looted antiquities -- both in its collection and loaned by wealthy donors, some of whom run the museum as trustees.

Three months later, de Montebello agreed to return 21 of the Met's gems to Italy, among them a 2,500-year-old vase painted by the Greek artist Euphronios.

While Italy secured a victory in this instance, the Met remains enmeshed in a broader tangle of donors, trustees and curators, some of whom have dealt in illicit antiquities, according to Italian and U.S. court decisions.

... the rest.