Argentina: Madres de Plaza de Mayo End Marches · Global Voices
David Sasaki

Ian discusses the end of the Thursday marches of the Madres de Plaza de Mayo. The mothers of victims of Argentina's 1976-1983 military dictatorship had marched weekly in search of justice until announcing last week that President Kirchner's government is a friend of their cause and there is no longer reason to protest. Robert Wright is amazed that the end of such a long-standing institution of contemporary Argentine culture received scant notice in the major national papers.
Update from an Argentine blogger:
The mothers of plaza de mayo did not put an end to their thursday marches. they ended their  yearly resistance march, an event they have held since 81. They have had Thursday marches since 76/77 and will go on with them. The resistance march was a day long event once a year, in different parts of the country, with concerts and a number of events (such as concerts), that's what ends. The two bloggers you mention in global voices roundup are mistaken. It's understandable  because its a bit complicated to understand the difference.
More here.