Santiago to Chillan (Terrasur), Talca to Constitución (a buscarril rather than a train but worth doing), and Tacna to/from Arica (autovagón). There is the Metrotren Santiago to San Fernando and the Merval in Valparaíso to Limache.
http://www.terrasur.cl/link.cgi/Servicios/Buscarril/
http://www.latercera.com/noticia/portad ... tren.shtml
I don't see the train south ever going further south than Chillan again. They tried a skeleton service to Temuco a few years ago during the summer but it didn't take. People seemed to prefer the bus or driving. I think the idea was to see if there was a market before sinking more money into it. Lagos' government sank a lot of money into the train south, new stations etc, but then one of their own pocketed a lot of that money.



