Can the Apple 10W USB charger be used with a 7-port USB hub to charge iPad 2, iPhone 4S, and other devices at the same time when traveling? When traveling, I probably will have the iPad 2, iPhone 4S, a USB backup charger, and some misc devices such as a Kindle Fire and a Sony digital camera that uses USB to charge its battery.

So instead of hooking them all up to the computer to charge them overnight, in the event that I actually need to charge every one of them that night, is it possible to use Apple's 10W USB charger that Apple makes (it is 100V to 240V compatible): 



and then hook it up to any USB hub, such as this Belkin 7-port one:



and be able to charge all the devices listed above at the same time?  (by the way, it seems that the smaller Apple USB charger with the green dot is 5W, so probably that one is not very powerful to charge all devices at the same time).
You typically will need one high-powered (5W) USB port for each of such devices to charge efficiently. The iPad alone requires more to charge, hence the non-standard 10W adapter. In addition, the USB hub itself is not likely to provide the necessary wattage to any of the ports (these usually are low-powered ports), so chances are not even one device will efficiently charge when connected alone to such a hub.