Microsoft CEO Steve Ballmer (L) shakes hands with Skype CEO Tony Bates during a news conference on May 10, 2011 in San Francisco, California. Microsoft has agreed to buy Skype for $8.5 billion. (Photo by Justin Sullivan/Getty Images)

Microsoft CEO Steve Ballmer speaks during a news conference about Microsoft's purchase of Skype on May 10, 2011 in San Francisco, California. (Photo by Justin Sullivan/Getty Images)

Kurt DelBene, President of Microsoft Office Division, left, and Neil Stevens, Vice President and General Manager of Skype Global Consumer attend a news conference about Microsoft's purchase of Skype on May 10, 2011 in London, England, Microsoft has agreed to buy Skype for $8.5 billion. (Photo by JSang Tan/Microsoft via Getty Images)