Apple’s latest iPods: What you need to know

The latest batch of iPods unveiled by Apple earlier this week are about to begin shipping, and this latest generation brings some pretty big changes across board. The sixth-generation iPod nano looks like something Dick Tracy would wear, the iPod shuffle got its buttons back, and the iPod touch is even closer to being an iPhone 4 without the phone. (Sadly, the iPod classic was excluded from the upgrade party, although it remains--begrudgingly, it seems--in the iPod lineup.)