I have a dock connected to my 990 and labeled 'iPhone' which I use for both my iPhone and 3rd generation iPod. I use the standard iPod dock which has a 1/8" line output jack on the back, connected to the 990 via 1/8" <> RCA cable. The line output from the iPod is actually quite good IMHO. If you're dealing with high bitrate MP3s, Apple lossless encoded files, or original WAVs, the iPod becomes a pretty impressive little source device.

- Jason