News bites: Justice Department prepares to sue Apple

The Justice Department could sue Apple as early as Wednesday over alleged price-fixing of e-books, Reuters reports, citing anonymous sources. 

Best Buy CEO Brian Dunn resigned amid an inquiry into his "personal conduct," The New York Times reports.

The Wall Street Journal examines how Google might use Motorola Mobility.

Bloomberg reports that Oracle and Google are preparing for what a judge called the "World Series of IP cases."

Wired crunches some numbers on Facebook's $1 billion purchase of Instagram. The figure comes out to $77 million per employee but only $28 per user.