Along with the iPad, the Apple chip has arrived.
Called the A4, ("A" presumably for Apple), the most obvious difference with the chip in the iPhone 3GS is speed. The iPad's chip runs at 1GHz, compared to the estimated 600MHz (0.6GHz) of the iPhone 3GS. On Wednesday, at the event in San Francisco, the A4 was billed as "the most advanced chip" Apple has done yet. While fast, it's also frugal with power. "The A4 chip is so power efficient that it helps iPad get up to 10 hours of battery life," according to Apple's iPad Web page.
Inside the iPad: Apple's new 'A4' chip | Nanotech - The Circuits Blog - CNET News