Mobile app downloads top 3.8 billion in first half of 2010; Research In Motion acquires app store developer Cellmania;

> Mobile app downloads top 3.8 billion in first half of 2010.

> Research In Motion acquires app store developer Cellmania.

> Facebook mobile app guru Hewitt trashes Android.

> Motorola scoops up 280 North to bolster Android app development.

> Vevo app for iPhone tops 1 million downloads in first week.

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