As the iPhone features the Apple Universal Dock from the iPods, it should be compatible with most iPod accessories already available (such as Drive+Play from Harman Kardon).
However, it is often required to turn off the phone function to avoid interference, your iPhone becomes then an iPod Touch. New peripherals and accessories will soon be released specifically for the iPhone ("Made for iPhone"), and should let users to keep the phone function on.
[translation by Linathael]
