I have a cooling fan with 4 USB ports that sits underneath my MacBook Pro. I only have two USB ports on the machine, so extras are a must. I unfortunately found out that this device doesn't have enough juice to power one of the My Passport external hard drives, so I really only have what's on the fan system's hub. Before, this wasn't a problem. A card reader in one port, usually the iPhone cable from the original iPhone in the other. Well a few minutes ago, I plugged the iPhone 3G S cable into one of the ports (I had it in the wall last night) on the fan unit. I got a message saying the device didn't support charging. Changed ports, same result. Unplugged the My Passport drive and plugged the iPhone into the MBP, and now it works. Does anybody else have this problem? It's highly annoying because I don't really feel like trying to find a powered hub that isn't a waste of $15 -- I've had my share of bad ones in the past. Any suggestions?