So I'm thinking about purchasing an iSimple IS75 for my car, which says that it has the capabilities of giving me line level outputs into RCA connectors while charging the phone from a power source hardwired into the car. This is exactly the sort of device I am wanting, but there seems to be some ambiguity as to what the connector for my 3GS will do. I have heard that newer devices have different pinouts in the dock connector for the power input, which could leave this device as a complete dud, and me waiting for something at some point in the future. Any input would be appreciated. Thanks.