There were a lot of iPod case vendors at the DLPP, including the well-respected Invisible Shield guys. Their clear, thin plastic iPod and cell phone covers take some time to apply -- the Motorola RAZR cover comes in six pieces and takes 25 minutes to put on, for instance -- but they're pretty much unscratchable, and they don't bulk up your device the way other cases do.

But the cases that made me go "wow" were from Mophie (at left). They make little rubberized cases that actually do stuff. One case is a headphone splitter (so two people can listen to your iPod.) One is an FM transmitter. One is a battery pack. One is an RF receiver with a wireless remote control. Mophie's cases are cute and bouncy, and I like the two-birds-with-one-stone approach of combining something to protect your Pod with something to enhance it.