Here is a page of links to Argentine net art: http://www.martagonzalezobras.com.ar/pagweb.htm . The page is put together by Marta Gonzales. It contains links to work from 1995 to the present. A lot of compelling work here I have not seen before.
The eavigo.com.ar site was put together by the people at http://www.vorticeargentina.com.ar . This is an organization in Argentina that deals with visual poetry of all types.