Coinciding with the release of iPhone Software 2.2 for the iPhone, iPhone 3G, and iPod touch, Apple has released an updated version of its iPhone Software Development Kit for the new software. Listed as build 9M2621, the updated SDK weighs in at 1.56GB and requires Mac OS X 10.5.5. iPhone SDK for iPhone OS 2.2 is available now as a free download for registered developers from the iPhone Dev Center.
