The BlackBerry still rocks when it comes to smartphone buyers. Research firm IDC says that in the second quarter Research in Motion (maker of the BlackBerry) captured more than 50 percent of the U.S. smartphone market, up from 44.5 percent in first quarter.

IDC attributes the increase to the release of new BlackBerry CDMA devices such as the Curve and the Pearl for Sprint Nextel and Verizon Wireless networks. Curve was launched with both networks in the second quarter of this year, while Pearl was launched with the two networks in the fourth quarter of last year.

Meanwhile, IDC says that Apple lost share in the second quarter. Apple's share declined as consumers waited for the July release of the iPhone 3G.

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