Anybody know of any websites where i could find out info on racing or just general riding in South America?

I am planning a year out next year after i finish uni (at last) and i have been able to find out info on races in the places where i am going (Far East, Australia, NZ, USA + Canada) however i haven't found a thing on DH in South America and Mexico?

Countries i will be heading to a number of countries but Argintina, Brazil and Bolivia (I have info on Bolivia thanks) arethe ones that i am trying to find out about.

As a round of the WC was in Brazil last season i presume that there must be some national series organised?? over there?

Cheers

Nick