Last week, the Wall Street Journal reported on apps tracking smartphone users - apps had access to people's unique device identifiers - it's like a serial number for your phone, like a social security number. Now, Apple and the makers of apps like Pandora, The Weather Channel and more are slapped with a suit in Northern California that seeks both monetary damages as well as a stop to the practice of tracking users. In January, the Mobile Marketing Association will start to develop mobile privacy guidelines.

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