Is there a SINGLE USB cable (or some kind of Y-cable) that will allow my iPhone 3GS to charge while my computer is in standby, but also allow it to sync when the computer is awake? I've searched high and low, but can't find a solution in the form of a cable/dock/adapter/whatever that will do both. For those who don't know, the iPhone 3GS does not allow charging from a USB charger unless certain voltage levels are present on the USB data pins. This rules out powered USB Hubs (at least the ones I've tried and/or read about) The 3GS also no longer accepts voltages on the firewire pins of the cable, so that's not an option either. The workarounds here are obvious, but my goal is to reduce cable clutter, and avoid having to switching the same USB cable between the AC adapter and my computer. Thanks.