As 3G/3Gs users patiently await the 06.15.00 basedband downgrade, a new video from this year's Hack in the Box conference has been making it's rounds on the internet. This is a discussion by @MuscleNerd on the evolution of the iPhone baseband and the subsequent unlocking tools that were developed by the iPhone-Dev team. It's a long video, but it really gives you some great insight into what goes into unlocking the iPhone baseband and also why it is so difficult to create new unlocks for new basebands.