I seem to be using a lot of hire cars recently, so I'm looking for an easy way to connect an iPhone 4 to a car audio system, with minimum fuss and rewiring.
I had a Griffin iTrip years and years ago, for a 2nd/3rd Generation iPod. It was fiddly to setup and needed retuning every hour or so. I'm sure the former problem is better now, but do they still lose the signal over time?
If so, are there any decent alternatives?