I just got done swapping my changer(useless in the trunk and without MP3 decoding) out for this.
I ended up using the USA*SPEC PA11-CHR:
I know this isn't the "nicest" product on the market, but it works just fine - especially for ~$100. It has both iPod and AUX connections available and also allows you to charge/use your iPod even while connected(to change artists, songs, etc).
It took about 20 mins to remove HU bezel, center console and side panel by glove box. I snaked the two cords behind the HVAC controller so I wouldn't have to remove it(plenty of room) and ran them next to some existing wires next to shifter. Next I drilled a hole in the center console bucket and store my iPod in there for easy access. Works great, couldn't be happier. Overall, about 10 screws and 30-45 mins and you'll be up and running.
Let me know if you have any questions/problems.