There are declassified documents on the US and Chile from the National Security Archive.
Chilean journalism research center CIPER criticizes the role of paper El Mercurio in supporting the Pinochet regime and failing to account for its actions afterwards.
Steve Anderson provides a personal piece for the Santiago Times on how September 11, 1973, changed his life.
The BBC has a slideshow of the commemorations and reports on the clashes between protesters and police.
The lingering effect of Pinochet's policies and resulting inequality is discussed by IPS.
In an editorial for La Tercera, Robert Funk asks what happens after the commemorations are over. He argues that the 11th is for remembering, and the 12th is for opening your eyes and coming to terms with the past (Vergangenheitsbewältigung). It's a very good piece.