The second generation iPad went on sale earlier today, to much fanfare and long, long lines. We're hard at work on our full review of Apple's second generation tablet but there were a few things we wanted to chime in on before too much time passed. The iPad 2 is a very logical update to the original iPad. The hardware gets an upgrade, with revised industrial design, a slimmer chassis, and Apple's new A5 SoC inside. A5 brings along two Cortex A9 cores, a dual core version of PowerVR's SGX543 graphics chip, and 512MB of memory. Software stays mostly the same but gets some tweaks; the iPad 2 ships with iOS 4.3, which was released earlier this week as an update for the iPhone 4 and original iPad.