So after doing a bunch of research (off and on), depending on my level of procrastination of other things, I found a discussion saying that Nissan is now offering an Ipod hook up for the Xterra 05-06 models. I'm not sure whether it'll work for previous models (like my 03), but I'm definately going to call tomorrow to find out. Apparently you'll be able to use steering wheel controls to change songs and playlists. Hopefully this isn't a really big conspiracy to mess with my mind.