There are at least five artists with the name Idiot Savant: 1) An experimental electronic music producer who has released his debut self-titled album 2011 2) A Crust/Grind/Hardcore band from Germany. They exist since summer 2000. They had several releases.
http://www.idiotsavant.de/ 3) An Indie Rock Band from the UK
http://www.myspace.com/idiotsavantbanduk 4) A pre-indie band in the US that has evolved into Wishing Wells.
http://www.wishingwellsmusic.com/ 5) An electronic music duo from Los Angeles consisting of Ron Levy and Jesse Wright

Read more about Idiot Savant on Last.fm.