AdMob announced today that its August 2008 AdMob Mobile Metrics Report show that the Apple iPhone has nearly doubled the amount of traffic it produces in August. More than 2.9 million requests per day came from iPhone users according to the report.

The top five smartphones in the US (in no order) according to the report are the iPhone, Palm Centro, BlackBerry Curve, BlackBerry Pearl, and Samsung Instinct. Those five handsets generated 12.9% of all US traffic in August.

Nokia has 62.4% of worldwide smartphone traffic, despite not having a top 20 smartphone in the US. RIM is second place with 10.8% worldwide and in the US RIM produces 31.2% of smartphone traffic. Smartphones in all accounted for 23.7% of traffic in the US in August.

Via AdMob