I purchased the iSimple "ipod/iphone gateway" device and had it installed at Best Buy. It a device that is installed into a car stereo to play the music. It uses an auxillary source (where you would put a disc changer etc). It's been awesome to date. I recently updated my iPhone to IOS 4.1. My phone doesn't sync up with the iSimple device anymore. I know it's not a problem with the iSimple device; I have a friend that's still on 4.0.1 and it works like a charm. I have docked my iPhone to other docking stations and it works fine, so it shouldn't be a problem with my phone. When I plug it into the iPhone in my vehicle, I see my stereo show "ipod is connected" and then "ipod is not connected" and goes back and forth. I see the screen on my iphone flashing back and forth also. Wondering if anyone out there is using the iSimple device that has run into the same issue as me. I want to revert back to the previous IOS, but it's pretty much impossible these days with itunes 10.