Yahoo buys Koprol to move into mobile social media

Very quickly after announcing an extended partnership with Nokia, Yahoo has further expanded its presence in the mobile market by acquiring Koprol, a social networking start-up based in Indonesia.

Only 2.5% of people can call-and-drive successfully

Do you really think you can use a cell phone and drive at the same time, without losing any focus at all? If you can, you're a very rare breed, according to a study that looked at a new way to analyze the mobile phone effect while driving.

Mobile activity in numbers: billions and trillions

91% of Americans now have a mobile phone subscription, over 1 trillion minutes of talk time was logged over wireless networks in the second half of 2009, and cell phone revenue climbed into the dozens of billions of dollars.