Hot on the heels of the latest iTunes update (8.0.2) the latest iPhone firmware (2.2) was released early this morning. It appears there are some pleasant surprises, as some unexpected features have been added, including a 3G baseband update. This update will not affect first generation iPhones but promises to reduce dropped calls and call setup failures on 3G models.
Other unexpected improvements include improved sound quality of Visual Voicemail messages, enhancements to Mail, and a new use for the Home button. Now from any Home screen pressing the Home button will display the first Home screen. This is a simple change that will cut down on tiresome swipes between screens.