I'm from Argentina, and work here: http://fiqus.com/ We (along with other cooperatives) founded the federation that is mentioned below (http://facttic.org.ar/)

Argentina is a great case. The coop movement there was the subject of a documentary called The Take (2004): http://www.thetake.org/index.cfm?page_name=synopsis

Another one from Argentina http://gcoop.coop/

Map of IT coops in Argentina: http://www.facttic.org.ar/miembros