I was interested in hearing more about artists Pasi (BU) met while he was in Brazil... it made me think of mexican artist collective SEMEFO. Fronted by Teresa la Llorona Margolles, a mortician at the police in Mexico City and founded together with members from Carmelo Pesado.
When she was in Göteborg in 2003 she exhibited quadrophonic sound of bonesaws going through craniums.
Some links:
http://www.youtube.com/watch?v=BtLcedTTIBc
http://www.tate.org.uk/liverpool/exhibitions/liverpoolbiennial06/artists/margolles.shtm
What about artists like Milo Sacchi?