Outside the traditional art world he's been an active member of the creative computer subculture, demoscene since the early 90s, where the artist nickname Nosfe comes from.
While he does sound art alone too, he also plays in several more or less experimental music projects, most notably Grey Park, Agnosia and Nega.
Pilvari has done performance and live art acts outside of Finland in at least Russia, Lithuania, Estonia, Latvia, Germany, Norway and Sweden.
Web links: http://www.youtube.com/user/nosfeh, http://low.fi/~nosfe/