I suspect these are fakes (animation or motion capture rather than autonomous balancing) but if these are for real, they're pretty impressive. Watch the MPEGs at the bottom of the pages: TeamOsaka, Robovie-M.
Current Music: The Plugz -- Hombre Secreto ♬
"A model presents a creation by Indonesian fashion designer Didi Budiardjo during Hong Kong Fashion Week for Spring/Summer 2005, in Hong Kong July 13, 2004. REUTERS/Kin Cheung"
Current Music: LFO -- Shove Piggy Shove ♬
Current Music: FM Einheit -- Russisches Roulett ♬