I've used a simple headphone jack--> RCA audio cable for years. Just recently, however, I went ahead and bought an Apple dock+AC adapter+Apple remote. That way, I can leave the dock plugged into the wall and my receiver, and grab the iPod from there when I want it portable. You can get generic docks and remotes for less than the Apple stuff, if you're interested. A lot cheaper than the Onkyo (or Denon, like my receiver) docks, though you can't control the iPod with your receiver's remote this way.