Gideon Yu, YouTube's former chief financial officer, has been hired as Facebook's new CFO, according to a story in The Wall Street Journal.  Yu, 36, replaces Mike Sheridan, who joined Facebook in September, according the Journal story. Why Mike Sheridan is leaving remains unclear.

Christian Jorg is appointed senior VP, new media and commerce, for the Island Def Jam Music Group. In his new post, Jorg will oversee all of IDJ's business activities in the digital and mobile space. Based in New York, Jorg will report directly to Island Records president/IDJ COO Steve Bartels.
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