Until the iPod supports wireless data transfers, you have to make do with unsexy but perfectly functional devices like Rapid Transit. It works as a middle man between two devices, which connect to it via USB. You can monitor and control what content gets transferred with the built-in display. With a little finagling, it'll let you copy songs from your buddies iPod to yours, too. It's available for $130.
Product Page [via New Launches]