News bites: Microsoft buys Yammer for $1.2 billion

Microsoft agreed to buy Yammer, a social network for businesses, for $1.2 billion, Bloomberg reports.

News Corp. is considering dividing itself into two companies, The New York Times reports.

Orbitz has started showing Mac users more expensive hotels, according to The Wall Street Journal.

Apple tweaked its message claiming to be immune from viruses, The New York Times reports.

CNN reports on the backlash that Facebook is facing after quietly changing all listed email addresses to Facebook addresses.