Yahoo! Inc. (NASDAQ:YHOO) has hired Wayne Powers to head up their North American advertising sales. Powers was an executive at Time Warner Inc. beforehand. Powers, 49, worked as the president of the media group at Time Inc. He will now be reporting to Ross Levinsohn. Powers is replacing Joanne Bradford, who left Yahoo! to join Demand Media. Yahoo! almost considered not replacing Bradford, but the executive she reported to, Hilary Schneider, also left the company. Levinsohn will be replacing Schneider later this year. [WSJ]

Yahoo! Inc. (NASDAQ:YHOO) SVP of U.S. Revenue and Market Development Joanne Bradford is leaving to join Demand Media.  She will take the position of Chief Revenue Officer at Demand Media. Bradford previously work as chief media officer of MSN Media Network.  She also worked at BusinessWeek and Spot Runner. [AllThingsD]