Almost too late, I met Chapa from Tacuman, Argentina (thats not him in the photo, it is Argentine rockers Dragonauta. Chapa is a hard man to find a photo of online) and discovered the Argentine stonerrock scene. Genevieve and I saw Chapa on the subway in Buenos Aires. He was wearing a MonsterMagnet "Spine of God" T-shirt, and Genevieve said in her non-spanish "Me Gusta Monster Magnet.. mi favorita!". It turns out Chapa spoke perfect english and started to tell us about Argentine stonerock.
The first surprising thing he told me is that NATAS (with more info here ), the group who released the awesome desertrock album Del Mar on Man's Ruin records years ago are actually from Argentina. They have since changed their name (due to legal pressure from some white-trash rap-rock band of the same name from the US) to LOS NATAS, and according to Chapa, they have only gotten better, with a sound that has expanded to include doom and pyschadelic elements. There is much audio evidence of this on their website's built-in audio player. Los Natas have kind of become the father figure to an emerging heavy music scene in Ar., playing shows regularly supported by some other up-and-coming acts.
Such as the awesome Dragonauta. Here are some audio and video samples-

Medley from their split with Abdullah
Dragonauta- Hijo Del Diablo
Dragonauta- the Superchrist
TOMEGAPENTAGRAM (video)
Dragonauta- Latargo Sabado (video)

Poseidotica, who offer a few very short clips of
paralexis
and tantra

and
Buffalo
Buffallo- Rio Arriba
The Wizard (live Black Sabbath cover, naturally)
Rio Arriba (video)
Playa Tortuga (video)

The Argentine metal, punk and stoner scene is covered by Noiseweb Argentina, and the national and international Metal scene is reveiwed in Jedbangers

I have plans to possibly visit Chapa in Tacuman, so I may have some more inside info soon. Chapa has 4, count em, 4 weblogs (en espanol, claro) sobre musica y vida. Aqui-
Goodbye Sober Days -
Reveiws From Hell -
Modernrockblog -
Killerweblog

Disfruta la rock!