I have found that charging my HTC Hero from the wall with the USB adapter charges faster than charging from the USB plugged into the pc. This may sound like common sense, but there's more to it... Some iPhone users have noticed that the charge from their phone when charged from the mains lasts longer than the charge from the PC via USB. Some sites claim that phone batteries can be 'overcharged' by charging from the mains, and that USB charging doesn't do this. I havn't had my phone long enough to test the 'overcharging' theory, but I was wondering if anyone had any information about these different methods of charging.