Santa Monica-based video games developer Activision has tapped former Yahoo! COO Dan Rosensweig as CEO of the firms's RedOctane business unit--the unit which is in charge of its Guitar Hero franchise. According to Activision, Rosensweig will oversee game development, hardware manufacturing, supply chain, logistics, and marketing for RedOctane. Rosensweig was most recently COO of Yahoo from 2002 to 2006. Rosensweig has also served at Ziff Davis, in a variety of roles, including President and CEO of ZDNet, and Vice-President and Publisher of PC Magazine. Activision said that Kai Huang, former President and CEO of RedOctane will continue on at RedOctane reporting to Rosensweig.