One of the worst accessories we saw at the show, the iKeep Charger ($49.99) is a cheaply made, oversize plastic carabiner with a pull-out cord that attaches to a two-in-one charging plug. The 30-pin iPhone connector is on the end of the cord, but you can also flip down the top to access the Micro-USB connector. Flip too enthusiastically, like we did, and you'll easily pull off the plastic panel to expose some circuitry underneath.
To retract the cable, just keep pulling until the string snaps back. Or, if you're like us, pull it out all the way without successfully retracting it, then hand the iKeep charger back to its minder and walk away.