The timing at least seems appropriate. Pandora is looking to expand beyond its signature radio streaming with the acquisition of Rdio, and the New York Times heard that the company has considered selling itself in recent weeks. It comes on the back of sub-par results where active listening dropped slightly year-over-year. Westergren's CEO role gives him the principal say in where his company is going, whether or not that involves a sale -- he doesn't have to worry that someone will sully his vision for online music.