I understand that the iPhone 3GS will not necessarily get power from all charging adapters. Is there a cable solution that properly directs voltage to the correct data pins, or is there an adapter solution? Basically, I'm just trying to use all my current chargers with the 3GS.

I've been using this LOD for my Ipod touch: New line out dock with stereo jack for iphone ipod nano - eBay (item 280370090381 end time Aug-09-09 22:19:44 PDT) But when connected to the Iphone 3GS, the audio is only coming out of the external speakers. Is there a setting that I'm not aware...