I just came from Costco. They had a Belkin kit with two wall chargers, one car charger, and one iPod/iPhone cable (plus mini-micro usb cables) for about $30. The cables are really heavy duty. I was looking for some extra chargers for all my Apple stuff. Won't worth with the iPad I think, or at least while the iPad is on. It might trickle charge it. Here's a few photos.

