First post, go easy on me!
My wife and I will be driving her '06 Mazda6 S from Cincinnati to Yellowstone in about three weeks and I had a couple questions. She currently has the 6 disc CD changer and no Aux input for our iPod. Couple questions:

1. How should I go about getting an aux input installed (cheapest/easiest) so we don't have to listen to our iPod through an FM transmitter for the 24 hour drive?

2. If I was to get her car hooked up with satellite radio, approx. how pricey would that be (besides the $12/month) and what would be the best way to do it? Just take it to Best Buy and have them throw it in and hook up the antenna?

Side note: I have an 01 Wrangler and do a lot of work on it myself, so I think I might be capable of doing these things, but it makes me a little nervous since her car hasn't been modded at all. I'll take my Jeep apart any day of the week and put it back together for fun. I just don't want to screw up her nice Mazda....