Apple has released the second beta version of the iPhone OS 4 Software Development Kit for the iPhone and iPod touch. As with the prior beta release, a main Xcode and SDK beta is available for download, as are pre-release builds of the iPhone OS 4 software for the iPhone 3G and 3GS, as well as the second- and third-generation iPod touch. Both the new SDK and pre-release builds are available now for download by registered iPhone developers from the…
